Study Results
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Recruitment Status
COMPLETED
Clinical Phase
NA
Total Enrollment
140 participants
Study Classification
INTERVENTIONAL
Study Start Date
2010-11-30
Study Completion Date
2014-10-31
Brief Summary
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The current study aims to evaluate the impacts of yoga and aerobic exercise on neuro-cognitive function, symptoms and brain changes in early psychosis. A total of 120 female subjects who aging from 18-55 years old, and diagnosed with psychotic disorders within the past 5 years, will be randomized into 3 groups: 1) yoga therapy, 2) aerobic exercise, and 3) waitlist group as the control. All groups will try to be kept consistent with their medication with no more than 25% change in their entry level dosage for at least six weeks. The primary outcomes of the present study will be neuro-cognitive changes; the secondary outcomes will be changes of brain structure and function.
Detailed Description
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STUDY OBJECTIVES AND PURPOSE
The present study aims to:
1. Compare the effects of a 12-week integrated yoga therapy and 12-week aerobic exercise program (walking and cycling) on cognitive functions, brain structures and function in female psychosis patients.
2. Compare the changes in physical fitness, clinical symptoms, body-perception, drug adherence, quality of life, and medicational side-effects.
Descriptive data acquired from this study will contribute to a better understanding of the research implications and clinical applications of yoga and aerobic exercise.
SUBJECTS This is a single-blinded, randomized, prospective study using psychopathological assessments, self-rating scales and imaging techniques. In this study, only female psychosis patients will be recruited from the Early Assessment Service for Young People with Psychosis Program (EASY) in Hong Kong, aiming to examine if there is any gender difference in comparison to the study by Pajonk et al. (2007), which selected only male subjects.
Ideally, patients taking Benzodiazepine and anti-depressants will be excluded because of the influence of these drugs on the cognitive test results and hippocampal volume. If it is deemed impractical to completely exclude these patients, all subjects will at least be tried to keep consistent with their antipsychotic dosages, by not permitting more than a 25% change in dose in the first 6 weeks after commencement of the intervention.
According to the data presented in the previous study (F. G. Pajonk et al., 2010), and using the statistical significant level 0.05 and the power 0.80, we calculated the sample size for cognitive assessment is 96 (32 each arm) and for brain imaging the sample required will be 48 (16 each arm) (Noordzij et al., 2010). Considering the drop-out rate will be around 30%, we aim to recruit 120 patients (40 each arm) with half of them (20 each arm) undergoing MRI scanning.
PROCEDURES Subjects will be screened by the clinicians in outpatient units in Hong Kong. They will be asked to sign the consent form when they agree to attend the study. Afterwards, they will be randomly divided into their respective intervention group. Each subject will be given a subject number, which will correspond to the group assignment. There will be two sessions of assessments. In the first session, all 120 subjects will be assessed by an investigator for their cognitive function, severity of symptoms, physical fitness, body-perception, drug adherence, quality of life, and medication side-effects. In the second session, the first 20 subjects recruited into each group will undergo a structural MRI and functional MRI (resting) scan at baseline.
Following the 12-week intervention, the subjects will repeat the same assessments and MRI scan as in the pre-intervention. Patients in waitlist will be provided another 3-month yoga or exercise course according to their willing after the waiting period. All the patients will be followed up for 18 months to assess the long-term effects of both interventions in cognition and symptoms.
For the nature of the study, it is difficult to keep patients blind to group allocation, so that the study can hardly be a double-blinded trial but a single-blinded one. Two investigators will do the yoga training and aerobic exercise without knowing the assessment results. Two research assistants will be well-trained and recruited to do the assessment, and remains blind to treatment allocation.
INTERVENTION PROGRAMS Yoga therapy: The yoga therapy consists of breathing control (10 minutes), body postures (40-45 minutes), and relaxation (5 minutes). The yoga therapy will be carried out three times per week for around 60 minutes at each session. The yoga class will be operated with a size of about 5-10 participants according to the general small-group size with one instructor in the commercial yoga studios in Hong Kong. The body postures used in the present study are designed to cover all body parts to give the body an overall strength and stretching.
Aerobic exercise: The aerobic exercise program will include walking on a treadmill (15-20 minutes), and stationary cycling (25-30 minutes), followed by cool-down stretching afterwards (5 minutes). The aerobic exercise program will also take place three times per week for around 45-55 minutes at each session. The heart rate will be continuously monitored during exercise by a portable recorder aiming to maintain the heart rate in the range of 50-60% of the maximum VO2 value, yielding an exercise exertion level which is considered as a moderate intensity. The aerobic training session will be operated with a size of no more than 10 participants.
Discontiuation: yoga and aerobic exercise will be terminated if the subject reports any uncomfortable symptoms or loses interests in continuing. Discontinuation or non-participation will not affect the usual medical treatment and care, which they receive in the clinical settings.
MEASURES The primary outcomes will be the cognitive tests (memory and attention). Severity of symptoms, physical fitness, and imaging data will be the secondary outcomes. For those patients who drop out during the study will be arranged to an additional assessment session at the withdrawal according to the willingness of the participants. Data of these drop-out patients will be used in the final analysis with the intention-to-treat (ITT) method.
All measurements will be taken at baseline, 12 weeks (upon completion of intervention program) and at 18 months for all 120 subjects. MRI will be carried out at baseline and at 12 weeks for the first 60 subjects recruited.
I. Cognitive Functioning
1. Wechsler Adult Intelligence Scale (WAIS): The current study uses Information sub-test and Digit-Symbol-Coding sub-test.
2. Hong Kong List Learning Test (HKLLT): is a validated Chinese list-learning test (Chan et al., 2000). It provides assessments of the processes and organizational strategies involved in verbal learning.
3. Digit Span Test: is a subtest of the Wechsler Adult Intelligence Scale-Revised. (Wechsler, 1981) It includes digit-span forwards (DF) and digit-span backwards (DB) tests.
3\. Letter Cancellation Test: subjects are asked to cancel the letter C and E as quickly as possible. Time, number of error and omission items will be recorded (Lezak, Howieson, \& Loring, 1995).
4\. Stroop Color and Word Test: Assessment of cognitive flexibility, resistance to interference from outside stimuli, and the ability to suppress a prepotent verbal response. (Stroop, 1935) 5. Subjective Cognitive Impairment Scale (SCIS): A 31-item self-reported questionnaire designed to assess the subjective daily life cognitive impairments in patients with schizophrenia.
II. Magnetic Resonance Imaging (MRI) The first 20 subjects recruited into each group will be scanned using a 3T scanner (Philips Achieva 3-Tesla Quasar). A T1-weighted, MPRAGE sequence (TE=3.2ms, TR=7.5ms, flip angle=7°, FOV 240mm×240 mm) of 155 consecutive slices will be acquired at sagittal view with a voxel size of 1mm×1mm×1 mm. A T2\*-weighted EPI sequence will be used for functional magnetic resonance (fMRI) resting (TR/TE=2000/32ms, 32 slices) with a voxel size of 3x3x4mm.
III. Physical Fitness:
1. VO2 max (oxygen consumption): is the maximum capacity of an individual's body to transport and utilize oxygen during incremental exercise, which reflects the physical fitness of the individual.
2. Body Mass Index (BMI).
3. Dual-energy X-Ray Absorptiometry (DXA): assesses the body composition and bone density by passing a very low-level x-ray signal through the body.
4. Sit-and-Reach test: is a common measure of flexibility, and specifically measures the flexibility of the lower back and hamstring muscles.
5. Standing Balance Test: ask the person to stand on one foot for as long as possible. The test will be conducted with the person having their arms on their waist. Repeat the test on the other leg.
6. Star Excursion Balance Test (SEBT) (Olmsted, Carcia, Hertel, \& Shultz, 2002): The SEBT is performed with the subject standing at the center of a grid placed on the floor, with 8 lines extending at 45。 increment from the center of the grid. The subject is asked to maintain a single-leg stance while reaching with the contralateral leg (reach leg) as far as possible along the appropriate vector. The distance from the center of the grid to the touch point is measured in centimeters.
IV. Clinical Assessment
1. Positive and Negative Syndrome Scale (PANSS).
2. Calgary Depression Scale (CDS).
V. Quality of Life The Short Form (36) Health Survey (SF-36).
VI. Body-perception and Drug adherence measure
1. Figure Rating Scale (FRS): there are seven male/female contour drawings, numbered "1" to "7", in increasing body size from left to right. Subjects are asked to choose one figure drawing that most accurately represents the size of their own bodies and then one that represents their desired figure.
2. Cognitive Attitude towards Body Size: subjects are asked whether they think they are: 1) underweight; 2) of normal weight; or 3) overweight.
3. Compliance Rating Scale (CRS): is used to assess medication adherence.
4. Drug Attitude Inventory (DAI-30): assesses the subjects' attitude to the current medication they are taking.
VII. Adverse event No current studies reported any physical or mental artifacts of yoga and aerobic exercise. There is some inherent potential risk of injury in any kind of physical activity. All exercises, both yoga and aerobic exercise, will be increased in a progressive manner to minimize this risk.
The adverse event of the antipsychotics will be assessed by UKU, which is a new comprehensive rating scale for psychotropic drugs and a cross-sectional study of side effects in neuroleptic-treated patients.
STATISTICS The Statistical Package for Social Sciences version 17.0 (SPSS 17.0 statistical package) will be used for the data analysis. Primary outcome variables will be cognition (Hong Kong List Learning Test), and structural imaging data (hippocampal and cingulate cortex volume).
A mixed effects model of repeated measure will be used to compare the changes in cognition and clinical symptoms among the three groups. With mixed effects model, all available data of each subject at each time point will be used (R. Gueorguieva \& J. H. Krystal, 2004). This strategy was based on the assumption that data were missing at random (Ralitza Gueorguieva \& John H Krystal, 2004).With the unstructured covariance structure (Joe et al., 2009), differences between the three intervention groups over time were assessed with a Group x Time interaction term. Primary outcome measures (HKLLT, Digit Span test, Letter Cancellation test) will be first analyzed by including all three groups. For analyses meeting this criterion of statistical significance, follow-up, the priori comparisons of the active intervention groups with the waitlist group were carried out with the same strategy. All tests will be based on two-sided probabilities set at a significance level of 0.05. The Bonferroni correction procedure will be conducted to adjust for the multiple comparisons among groups.The effect size (Cohen's d) will be calculated as well to compare the therapeutic effects of yoga and aerobic exercise among the three groups.
Image processing and analysis will be carried out with the software packages FSL4.1, Freesurfer 5.1 and SPM8. The primary outcomes of structural MRI data will be the changes of grey matter in hippocampus and prefrontal cortex. The primary outcomes of functional MRI data will be the activity changes in prefrontal cortex and cingulate cortex.
The present study aims to:
1. Compare the effects of a 12-week integrated yoga therapy and 12-week aerobic exercise program (walking and cycling) on cognitive functions, brain structures and function in female psychosis patients.
2. Compare the changes in physical fitness, clinical symptoms, body-perception, drug adherence, quality of life, and medicational side-effects.
Descriptive data acquired from this study will contribute to a better understanding of the research implications and clinical applications of yoga and aerobic exercise.
SUBJECTS This is a single-blinded, randomized, prospective study using psychopathological assessments, self-rating scales and imaging techniques. In this study, only female psychosis patients will be recruited from the Early Assessment Service for Young People with Psychosis Program (EASY) in Hong Kong, aiming to examine if there is any gender difference in comparison to the study by Pajonk et al. (2007), which selected only male subjects.
Ideally, patients taking Benzodiazepine and anti-depressants will be excluded because of the influence of these drugs on the cognitive test results and hippocampal volume. If it is deemed impractical to completely exclude these patients, all subjects will at least be tried to keep consistent with their antipsychotic dosages, by not permitting more than a 25% change in dose in the first 6 weeks after commencement of the intervention.
According to the data presented in the previous study (F. G. Pajonk et al., 2010), and using the statistical significant level 0.05 and the power 0.80, we calculated the sample size for cognitive assessment is 96 (32 each arm) and for brain imaging the sample required will be 48 (16 each arm) (Noordzij et al., 2010). Considering the drop-out rate will be around 30%, we aim to recruit 120 patients (40 each arm) with half of them (20 each arm) undergoing MRI scanning.
PROCEDURES Subjects will be screened by the clinicians in outpatient units in Hong Kong. They will be asked to sign the consent form when they agree to attend the study. Afterwards, they will be randomly divided into their respective intervention group. Each subject will be given a subject number, which will correspond to the group assignment. There will be two sessions of assessments. In the first session, all 120 subjects will be assessed by an investigator for their cognitive function, severity of symptoms, physical fitness, body-perception, drug adherence, quality of life, and medication side-effects. In the second session, the first 20 subjects recruited into each group will undergo a structural MRI and functional MRI (resting) scan at baseline.
Following the 12-week intervention, the subjects will repeat the same assessments and MRI scan as in the pre-intervention. Patients in waitlist will be provided another 3-month yoga or exercise course according to their willing after the waiting period. All the patients will be followed up for 18 months to assess the long-term effects of both interventions in cognition and symptoms.
For the nature of the study, it is difficult to keep patients blind to group allocation, so that the study can hardly be a double-blinded trial but a single-blinded one. Two investigators will do the yoga training and aerobic exercise without knowing the assessment results. Two research assistants will be well-trained and recruited to do the assessment, and remains blind to treatment allocation.
INTERVENTION PROGRAMS Yoga therapy: The yoga therapy consists of breathing control (10 minutes), body postures (40-45 minutes), and relaxation (5 minutes). The yoga therapy will be carried out three times per week for around 60 minutes at each session. The yoga class will be operated with a size of about 5-10 participants according to the general small-group size with one instructor in the commercial yoga studios in Hong Kong. The body postures used in the present study are designed to cover all body parts to give the body an overall strength and stretching.
Aerobic exercise: The aerobic exercise program will include walking on a treadmill (15-20 minutes), and stationary cycling (25-30 minutes), followed by cool-down stretching afterwards (5 minutes). The aerobic exercise program will also take place three times per week for around 45-55 minutes at each session. The heart rate will be continuously monitored during exercise by a portable recorder aiming to maintain the heart rate in the range of 50-60% of the maximum VO2 value, yielding an exercise exertion level which is considered as a moderate intensity. The aerobic training session will be operated with a size of no more than 10 participants.
Discontiuation: yoga and aerobic exercise will be terminated if the subject reports any uncomfortable symptoms or loses interests in continuing. Discontinuation or non-participation will not affect the usual medical treatment and care, which they receive in the clinical settings.
MEASURES The primary outcomes will be the cognitive tests (memory and attention). Severity of symptoms, physical fitness, and imaging data will be the secondary outcomes. For those patients who drop out during the study will be arranged to an additional assessment session at the withdrawal according to the willingness of the participants. Data of these drop-out patients will be used in the final analysis with the intention-to-treat (ITT) method.
All measurements will be taken at baseline, 12 weeks (upon completion of intervention program) and at 18 months for all 120 subjects. MRI will be carried out at baseline and at 12 weeks for the first 60 subjects recruited.
I. Cognitive Functioning
1. Wechsler Adult Intelligence Scale (WAIS): The current study uses Information sub-test and Digit-Symbol-Coding sub-test.
2. Hong Kong List Learning Test (HKLLT): is a validated Chinese list-learning test (Chan et al., 2000). It provides assessments of the processes and organizational strategies involved in verbal learning.
3. Digit Span Test: is a subtest of the Wechsler Adult Intelligence Scale-Revised. (Wechsler, 1981) It includes digit-span forwards (DF) and digit-span backwards (DB) tests.
3\. Letter Cancellation Test: subjects are asked to cancel the letter C and E as quickly as possible. Time, number of error and omission items will be recorded (Lezak, Howieson, \& Loring, 1995).
4\. Stroop Color and Word Test: Assessment of cognitive flexibility, resistance to interference from outside stimuli, and the ability to suppress a prepotent verbal response. (Stroop, 1935) 5. Subjective Cognitive Impairment Scale (SCIS): A 31-item self-reported questionnaire designed to assess the subjective daily life cognitive impairments in patients with schizophrenia.
II. Magnetic Resonance Imaging (MRI) The first 20 subjects recruited into each group will be scanned using a 3T scanner (Philips Achieva 3-Tesla Quasar). A T1-weighted, MPRAGE sequence (TE=3.2ms, TR=7.5ms, flip angle=7°, FOV 240mm×240 mm) of 155 consecutive slices will be acquired at sagittal view with a voxel size of 1mm×1mm×1 mm. A T2\*-weighted EPI sequence will be used for functional magnetic resonance (fMRI) resting (TR/TE=2000/32ms, 32 slices) with a voxel size of 3x3x4mm.
III. Physical Fitness:
1. VO2 max (oxygen consumption): is the maximum capacity of an individual's body to transport and utilize oxygen during incremental exercise, which reflects the physical fitness of the individual.
2. Body Mass Index (BMI).
3. Dual-energy X-Ray Absorptiometry (DXA): assesses the body composition and bone density by passing a very low-level x-ray signal through the body.
4. Sit-and-Reach test: is a common measure of flexibility, and specifically measures the flexibility of the lower back and hamstring muscles.
5. Standing Balance Test: ask the person to stand on one foot for as long as possible. The test will be conducted with the person having their arms on their waist. Repeat the test on the other leg.
6. Star Excursion Balance Test (SEBT) (Olmsted, Carcia, Hertel, \& Shultz, 2002): The SEBT is performed with the subject standing at the center of a grid placed on the floor, with 8 lines extending at 45。 increment from the center of the grid. The subject is asked to maintain a single-leg stance while reaching with the contralateral leg (reach leg) as far as possible along the appropriate vector. The distance from the center of the grid to the touch point is measured in centimeters.
IV. Clinical Assessment
1. Positive and Negative Syndrome Scale (PANSS).
2. Calgary Depression Scale (CDS).
V. Quality of Life The Short Form (36) Health Survey (SF-36).
VI. Body-perception and Drug adherence measure
1. Figure Rating Scale (FRS): there are seven male/female contour drawings, numbered "1" to "7", in increasing body size from left to right. Subjects are asked to choose one figure drawing that most accurately represents the size of their own bodies and then one that represents their desired figure.
2. Cognitive Attitude towards Body Size: subjects are asked whether they think they are: 1) underweight; 2) of normal weight; or 3) overweight.
3. Compliance Rating Scale (CRS): is used to assess medication adherence.
4. Drug Attitude Inventory (DAI-30): assesses the subjects' attitude to the current medication they are taking.
VII. Adverse event No current studies reported any physical or mental artifacts of yoga and aerobic exercise. There is some inherent potential risk of injury in any kind of physical activity. All exercises, both yoga and aerobic exercise, will be increased in a progressive manner to minimize this risk.
The adverse event of the antipsychotics will be assessed by UKU, which is a new comprehensive rating scale for psychotropic drugs and a cross-sectional study of side effects in neuroleptic-treated patients.
STATISTICS The Statistical Package for Social Sciences version 17.0 (SPSS 17.0 statistical package) will be used for the data analysis. Primary outcome variables will be cognition (Hong Kong List Learning Test), and structural imaging data (hippocampal and cingulate cortex volume).
A mixed effects model of repeated measure will be used to compare the changes in cognition and clinical symptoms among the three groups. With mixed effects model, all available data of each subject at each time point will be used (R. Gueorguieva \& J. H. Krystal, 2004). This strategy was based on the assumption that data were missing at random (Ralitza Gueorguieva \& John H Krystal, 2004).With the unstructured covariance structure (Joe et al., 2009), differences between the three intervention groups over time were assessed with a Group x Time interaction term. Primary outcome measures (HKLLT, Digit Span test, Letter Cancellation test) will be first analyzed by including all three groups. For analyses meeting this criterion of statistical significance, follow-up, the priori comparisons of the active intervention groups with the waitlist group were carried out with the same strategy. All tests will be based on two-sided probabilities set at a significance level of 0.05. The Bonferroni correction procedure will be conducted to adjust for the multiple comparisons among groups.The effect size (Cohen's d) will be calculated as well to compare the therapeutic effects of yoga and aerobic exercise among the three groups.
Image processing and analysis will be carried out with the software packages FSL4.1, Freesurfer 5.1 and SPM8. The primary outcomes of structural MRI data will be the changes of grey matter in hippocampus and prefrontal cortex. The primary outcomes of functional MRI data will be the activity changes in prefrontal cortex and cingulate cortex.
Conditions
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Psychotic Disorder
Keywords
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psychosis
yoga
aerobic exercise
memory
attention
neuro cognition
Study Design
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Allocation Method
RANDOMIZED
Intervention Model
PARALLEL
Primary Study Purpose
TREATMENT
Blinding Strategy
SINGLE
Outcome Assessors
Study Groups
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Yoga therapy
Hatha yoga including breathing control (10 minutes), body posture(40-45minutes), and relaxation (5 minutes).
Group Type
EXPERIMENTAL
Yoga therapy
Intervention Type
BEHAVIORAL
3 sessions per week for 12 weeks, total 36 sessions. Each session lasts around one hour.
Aerobic exercise
Aerobic exercise includes walking on the treadmill for 15-20 minutes and stationary cycling for 25-30 minutes.
Group Type
EXPERIMENTAL
Aerobic exercise
Intervention Type
BEHAVIORAL
3 session per week for 12 weeks, total 36 sessions. Each session lasts around one hour.
Waitlist group
Patients in waiting list will be treated as usual and acted as control group.
Group Type
NO_INTERVENTION
No interventions assigned to this group
Interventions
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Yoga therapy
3 sessions per week for 12 weeks, total 36 sessions. Each session lasts around one hour.
Intervention Type
BEHAVIORAL
Aerobic exercise
3 session per week for 12 weeks, total 36 sessions. Each session lasts around one hour.
Intervention Type
BEHAVIORAL
Eligibility Criteria
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Inclusion Criteria
* Females aged from 18 to 55.
* Based on the Diagnostic and Statistical Manual (DSM-IV) diagnosed to have schizophrenia, schizoaffective disorder, schizophreniform Psychosis, brief psychotic disorders, psychosis not otherwise specified and delusional disorder. Duration of illness is less than 5 years (including 5 years).
* Cantonese-speaking Chinese.
* Ability to understand the nature of the study and to give an informed consent.
* Fewer than 10 hours of yoga and vigorous aerobic exercise (equivalent to jogging at 10 km/hr) in the previous 3 months.
* Based on the Diagnostic and Statistical Manual (DSM-IV) diagnosed to have schizophrenia, schizoaffective disorder, schizophreniform Psychosis, brief psychotic disorders, psychosis not otherwise specified and delusional disorder. Duration of illness is less than 5 years (including 5 years).
* Cantonese-speaking Chinese.
* Ability to understand the nature of the study and to give an informed consent.
* Fewer than 10 hours of yoga and vigorous aerobic exercise (equivalent to jogging at 10 km/hr) in the previous 3 months.
Exclusion Criteria
* Severe physical illness (myocardial infarction, hypertension, fracture, spinal problem), seizure disorders, mental retardation or comorbid substance dependence. Heart rate and blood pressure will be measured at the baseline to exclude the patients with abnormal cardiovascular activities.
* Unstable psychotic symptoms.
* Known pregnancy, or other contraindication to MRI.
* A history of brain trauma or organic brain disease.
* Known history of intellectual disability or special school attendance.
* Unstable psychotic symptoms.
* Known pregnancy, or other contraindication to MRI.
* A history of brain trauma or organic brain disease.
* Known history of intellectual disability or special school attendance.
Minimum Eligible Age
18 Years
Maximum Eligible Age
55 Years
Eligible Sex
FEMALE
Accepts Healthy Volunteers
No
Sponsors
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The University of Hong Kong
OTHER
Sponsor Role
lead
Responsible Party
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Eric Y H Chen
Professor, Head
Responsibility Role
PRINCIPAL_INVESTIGATOR
Principal Investigators
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Jessie, JX Lin, PhD
Role: STUDY_CHAIR
Department of Psychiatry, the University of Hong Kong
Locations
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Department of Psychiatry, LKS Faculty of Medicine, the University of Hong Kong
Hong Kong, , Hong Kong
Site Status
Countries
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Hong Kong
References
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Addington J, Addington D, Gasbarre L. Distractibility and symptoms in schizophrenia. J Psychiatry Neurosci. 1997 May;22(3):180-4.
Reference Type
BACKGROUND
Duraiswamy G, Thirthalli J, Nagendra HR, Gangadhar BN. Yoga therapy as an add-on treatment in the management of patients with schizophrenia--a randomized controlled trial. Acta Psychiatr Scand. 2007 Sep;116(3):226-32. doi: 10.1111/j.1600-0447.2007.01032.x.
Reference Type
BACKGROUND
Heyn P, Abreu BC, Ottenbacher KJ. The effects of exercise training on elderly persons with cognitive impairment and dementia: a meta-analysis. Arch Phys Med Rehabil. 2004 Oct;85(10):1694-704. doi: 10.1016/j.apmr.2004.03.019.
Reference Type
BACKGROUND
Kelley WM, Macrae CN, Wyland CL, Caglar S, Inati S, Heatherton TF. Finding the self? An event-related fMRI study. J Cogn Neurosci. 2002 Jul 1;14(5):785-94. doi: 10.1162/08989290260138672.
Reference Type
BACKGROUND
Kubesch S, Bretschneider V, Freudenmann R, Weidenhammer N, Lehmann M, Spitzer M, Gron G. Aerobic endurance exercise improves executive functions in depressed patients. J Clin Psychiatry. 2003 Sep;64(9):1005-12. doi: 10.4088/jcp.v64n0905.
Reference Type
BACKGROUND
Lam LC, Tam CW, Lui VW, Chan WC, Chan SS, Chiu HF, Wong A, Tham MK, Ho KS, Chan WM. Modality of physical exercise and cognitive function in Hong Kong older Chinese community. Int J Geriatr Psychiatry. 2009 Jan;24(1):48-53. doi: 10.1002/gps.2072.
Reference Type
BACKGROUND
Lautenschlager NT, Cox KL, Flicker L, Foster JK, van Bockxmeer FM, Xiao J, Greenop KR, Almeida OP. Effect of physical activity on cognitive function in older adults at risk for Alzheimer disease: a randomized trial. JAMA. 2008 Sep 3;300(9):1027-37. doi: 10.1001/jama.300.9.1027.
Reference Type
BACKGROUND
Pajonk FG, Wobrock T, Gruber O, Scherk H, Berner D, Kaizl I, Kierer A, Muller S, Oest M, Meyer T, Backens M, Schneider-Axmann T, Thornton AE, Honer WG, Falkai P. Hippocampal plasticity in response to exercise in schizophrenia. Arch Gen Psychiatry. 2010 Feb;67(2):133-43. doi: 10.1001/archgenpsychiatry.2009.193.
Reference Type
BACKGROUND
Sharma VK, Das S, Mondal S, Goswami U, Gandhi A. Effect of Sahaj Yoga on neuro-cognitive functions in patients suffering from major depression. Indian J Physiol Pharmacol. 2006 Oct-Dec;50(4):375-83.
Reference Type
BACKGROUND
Whitfield-Gabrieli S, Thermenos HW, Milanovic S, Tsuang MT, Faraone SV, McCarley RW, Shenton ME, Green AI, Nieto-Castanon A, LaViolette P, Wojcik J, Gabrieli JD, Seidman LJ. Hyperactivity and hyperconnectivity of the default network in schizophrenia and in first-degree relatives of persons with schizophrenia. Proc Natl Acad Sci U S A. 2009 Jan 27;106(4):1279-84. doi: 10.1073/pnas.0809141106. Epub 2009 Jan 21.
Reference Type
BACKGROUND
Woodward ML, Lin J, Gicas KM, Su W, Hui CLM, Honer WG, Chen EYH, Lang DJ. Medial temporal lobe cortical changes in response to exercise interventions in people with early psychosis: A randomized controlled trial. Schizophr Res. 2020 Sep;223:87-95. doi: 10.1016/j.schres.2020.05.043. Epub 2020 May 30.
Reference Type
DERIVED
Other Identifiers
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YEP_2010
Identifier Type: -
Identifier Source: org_study_id