Does Fall Arrest Strategy Training Improve Capacity to Prevent Fall-Related Injury in Older Women?
NCT ID: NCT04844047
Last Updated: 2021-04-14
Study Results
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Basic Information
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COMPLETED
NA
40 participants
INTERVENTIONAL
2016-08-24
2017-04-18
Brief Summary
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Detailed Description
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Exercise is known to decrease fall risk in community-dwelling older adults and should theoretically also reduce risk for injury during a fall; however, there are no clinical trials evaluating exercises designed specifically to enhance safe landing when a fall is imminent. Ideally, the health care team would like to support older adults in preventing all falls but in reality, this is not possible. Developing an intervention targeting both fall AND injury prevention (in the event a fall is inevitable) should enhance the effectiveness of exercise for reducing fall-related injury. This study will investigate the efficacy of novel Fall-Arrest Strategy Training (FAST) to improve the physical capacity to arrest a fall and reduce injury risk in older community-dwelling women.
The risk of injury from falls depends on both the severity of impact and neuromuscular capacity such as bone and muscle strength of the affected body part. Sixty percent of all falls in older adults occur in a forward direction, more often in women than men. Forward falls are typically combined with hand contact as a protective response to prevent head, hip or torso injury. The effectiveness of these important protective strategies unfortunately decreases with aging. Evidence suggests forward fall arrest strategies can be modified to improve safe landing and reduce impact forces. The critically important question is whether older adults, in particular older women at high risk for fracture, can enhance their ability to efficiently utilize fall arrest strategies intended to diminish both the risk of head impact and the risk of wrist fracture.
Fall Arrest Strategy Training (FAST) is a new, innovative exercise intervention the investigators have developed uniquely focusing on enhancing upper extremity (UE) strength, response time, trunk control and specific strategies to safely lower the body. The severity of impact with a forward fall is determined primarily by pre-impact neuromuscular factors - muscle strength, movement time, and kinematic placement of the upper extremity (UE) which may also depend on available joint range of motion (ROM). FAST uses functional exercises specifically targeted to address these factors and are easily incorporated into general fall prevention programs. Staying on Your Feet is an established and effective fall prevention program offered to community-dwelling older adults in the Saskatoon Health Region. The feasibility of implementing FAST into Staying on Your Feet was verified in a previous pilot study. The important extension of this work is to determine if functional improvements result in improved fall-specific neuromuscular capacity and ability to absorb energy. The focus of this project is to further advance our understanding of the effect of FAST on functional fall risk outcomes and fall-arrest capacity in older women.
The goal of FAST is to increase fall-arrest capacity, defined as neuromuscular ability that could be utilized to prevent and minimize injury during a fall. While fall-related injury risk is difficult to measure directly, increases in fall-arrest capacity will likely lead to a reduction in that risk. Therefore, the effectiveness of injury risk reduction interventions such as FAST can be measured by their ability to increase fall-arrest capacity. One important factor recently emerging in the falls literature is energy absorption; older women absorb less energy in their UE during a controlled forward descent compared to younger women. The investigators have developed an experimental apparatus which can measure UE energy absorption in both controlled and unexpected forward body descents. Muscle strength, particularly surrounding the shoulder girdle and elbow, is another important forward fall-arrest capacity factor.
The purpose of this study is to advance knowledge of this innovative and simple training program, FAST, integrated into fall prevention programming, to determine if it has potential to improve the physical capacity to arrest a fall and reduce injury risk in older community-dwelling women. This proposed study will use novel lab-based energy absorption and strength measures, combined with functional measures of mobility and fall risk. Fall-arrest capacity changes after an intervention such as FAST have never been examined in older women.
Research Goals and Objectives: The principal research questions of this study are: 1) Does the addition of FAST training lead to improvements in UE energy absorption during controlled and unexpected forward descents as compared to a Standard fall prevention exercise program (Standard Exercise) focusing on walking, balance and lower extremity strength? 2) Does FAST produce greater gains in functional arm muscle strength, response time, mobility and balance control compared to Standard Exercise? The hypotheses are that FAST will result in greater improvements in energy absorption, UE strength, response time and mobility compared to Standard Exercise at the end of 12 weeks of training with similar gains in fall risk and balance control.
Trial Design and Methodology: The proposed study is a pilot randomized trial where women, age 60 years or older living in the community will be randomly assigned to either FAST or Standard Exercise. Education on fall prevention will be provided to both groups. The exercise groups will be offered in the community, coordinated with an existing fall prevention program (Staying on Your Feet; Saskatoon Health Region). Participants will be recruited via announcements and posters in the community. Interested participants are invited to attend an information session prior to the start of the program and a screening questionnaire will be administered in person or by telephone. Eligibility criteria is explained in detail elsewhere. Eligible participants will be randomly assigned to either group using a random allocation conducted by someone not directly involved in the study. Measures will be collected at the College of Kinesiology Biomechanics of Balance and Movement Lab, University of Saskatchewan at the start of the training (baseline), and immediately post intervention. An experienced physical therapist or exercise therapist will supervise FAST and Standard Exercise. Both exercise programs will occur twice per week, 45 minutes duration, for 12 weeks at a community site. FAST will include the same exercises to improve balance, walking and general mobility as Standard Exercise, but will also incorporate FAST training.
Outcome Measures: Outcome measures are designed to inform five primary fall-arrest capacity variables: 1) energy absorption in controlled descent, 2) energy absorption in unexpected descent, 3) eccentric muscle strength, 4) concentric muscle strength, 5) UE response time and secondary measures of fall risk, joint range of motion and balance and are described in detail elsewhere.
Analysis: Effect sizes for this study were estimated using variability data from our previous fall-arrest capacity work with young and older women and other published UE energy data. Our pilot data with older adults has shown a 20% higher energy absorption in adults who perform more UE training. A clinically meaningful increase in energy absorption is unknown. Based on our data, a 25% increase in the energy absorption will require 16 participants per group to detect differences at 80% power. Intention-to-treat analysis will be conducted using all participants assigned to intervention or control sites. A completer only analysis (based on attendance rates) will also be conducted. Repeated measures MANOVA tests will test for time and time\*group differences across the 12 week time period for the five primary variables: energy absorption in controlled an unexpected descent, concentric and eccentric arm muscle strength and UE reaction time as well as the secondary measures of joint mobility, balance and fall risk. Given the exploratory nature of this study, significance will be set at p\<0.05 for omnibus tests.
Conditions
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Study Design
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RANDOMIZED
PARALLEL
PREVENTION
SINGLE
Study Groups
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FAST
Twice per week exercise program, 45 minutes duration for 12 weeks conducted in the community. Participants attended a 30-minute fall prevention education session once per week. FAST followed the same principles as Standard, with the addition of the following goals: 1) Increase UE strength (shoulder girdle/arm) utilizing both concentric and eccentric contractions, 2) Improve trunk and neck postural control during slow and fast body motions, 3) Optimize forward descent strategies via practice of quick response reaching, landing and controlled descent with hands on the wall or on the floor as able. Training progression for strength and body control included increasing the distance standing from the wall, progressing to one arm descents, increasing reps and speed and moving to greater gravity and body weight resistance such as hands and knees position on the floor as able. Quick movement practice targeted unexpected reaching activities, balloon and ball toss
Exercise
refer to arm descriptors
Standard
Twice per week exercise program, 45 minutes duration for 12 weeks conducted in a community site (assisted living residence). Participants also attended a 3o minute fall prevention education session once per week. The Standard intervention consisted of a fall prevention exercise program designed for community-dwelling older adults. Exercises focussed on balance, leg strength, walking and mobility exercises designed to decrease fall risk.
Exercise
refer to arm descriptors
Interventions
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Exercise
refer to arm descriptors
Exercise
refer to arm descriptors
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
* A prior distal radius fracture in the past 2 years,
* Any fracture in the past year, or multiple fractures of the wrist or forearm,
* Any history of UE neurological problems (i.e. Stroke, Multiple Sclerosis, Parkinson's Disease, Reflex Neuropathy),
* Any cardio-vascular problems that would contradict UE strength testing or training,
* Any signs of severe cognitive impairment or
* Unable to safely ambulate independently (with or without a walking aid) in the community.
A medical and demographic screening questionnaire as well as the Mini-Cog (Borson et al, 2000) were used to determine eligibility.
60 Years
FEMALE
Yes
Sponsors
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University of Saskatchewan
OTHER
Responsible Party
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Cathy Arnold
Professor
Principal Investigators
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Cathy Arnold, PhD
Role: PRINCIPAL_INVESTIGATOR
School Of Rehabilitation Science, University Of Saskatchewan
References
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DeGoede KM, Ashton-Miller JA. Fall arrest strategy affects peak hand impact force in a forward fall. J Biomech. 2002 Jun;35(6):843-8. doi: 10.1016/s0021-9290(02)00011-8.
DeGoede KM, Ashton-Miller JA. Biomechanical simulations of forward fall arrests: effects of upper extremity arrest strategy, gender and aging-related declines in muscle strength. J Biomech. 2003 Mar;36(3):413-20. doi: 10.1016/s0021-9290(02)00396-2.
Borson S, Scanlan J, Brush M, Vitaliano P, Dokmak A. The mini-cog: a cognitive 'vital signs' measure for dementia screening in multi-lingual elderly. Int J Geriatr Psychiatry. 2000 Nov;15(11):1021-7. doi: 10.1002/1099-1166(200011)15:113.0.co;2-6.
Sran MM, Stotz PJ, Normandin SC, Robinovitch SN. Age differences in energy absorption in the upper extremity during a descent movement: implications for arresting a fall. J Gerontol A Biol Sci Med Sci. 2010 Mar;65(3):312-7. doi: 10.1093/gerona/glp153. Epub 2009 Oct 27.
Lee Y, Ashton-Miller JA. The effects of gender, level of co-contraction, and initial angle on elbow extensor muscle stiffness and damping under a step increase in elbow flexion moment. Ann Biomed Eng. 2011 Oct;39(10):2542-9. doi: 10.1007/s10439-011-0308-3. Epub 2011 Apr 12.
Lo J, McCabe GN, DeGoede KM, Okuizumi H, Ashton-Miller JA. On reducing hand impact force in forward falls: results of a brief intervention in young males. Clin Biomech (Bristol). 2003 Oct;18(8):730-6. doi: 10.1016/s0268-0033(03)00124-4.
Maki BE, McIlroy WE. Control of rapid limb movements for balance recovery: age-related changes and implications for fall prevention. Age Ageing. 2006 Sep;35 Suppl 2:ii12-ii18. doi: 10.1093/ageing/afl078.
Public Health Agency of Canada. Seniors' Falls in Canada. 2nd Report. 2014; www.phac-aspc.gc.ca/seniors-aines [On-line].
Schonnop R, Yang Y, Feldman F, Robinson E, Loughin M, Robinovitch SN. Prevalence of and factors associated with head impact during falls in older adults in long-term care. CMAJ. 2013 Nov 19;185(17):E803-10. doi: 10.1503/cmaj.130498. Epub 2013 Oct 7.
Sherrington C, Whitney JC, Lord SR, Herbert RD, Cumming RG, Close JC. Effective exercise for the prevention of falls: a systematic review and meta-analysis. J Am Geriatr Soc. 2008 Dec;56(12):2234-43. doi: 10.1111/j.1532-5415.2008.02014.x.
Chiu J, Robinovitch SN. Prediction of upper extremity impact forces during falls on the outstretched hand. J Biomech. 1998 Dec;31(12):1169-76. doi: 10.1016/s0021-9290(98)00137-7.
Arnold CM, Walker-Johnston J, Lanovaz JL, Lattimer LJ. Does Fall Arrest Strategy Training Added to a Fall Prevention Programme Improve Balance, Strength, and Agility in Older Women? A Pilot Study. Physiother Can. 2017;69(4):323-332. doi: 10.3138/ptc.2016-27EP.
Lattimer LJ, Lanovaz JL, Farthing JP, Madill S, Kim S, Robinovitch S, Arnold C. Female Age-Related Differences in Biomechanics and Muscle Activity During Descents on the Outstretched Arms. J Aging Phys Act. 2017 Jul;25(3):474-481. doi: 10.1123/japa.2016-0102. Epub 2017 Jun 28.
Lattimer LJ, Lanovaz JL, Farthing JP, Madill S, Kim SY, Robinovitch S, Arnold CM. Biomechanical and physiological age differences in a simulated forward fall on outstretched hands in women. Clin Biomech (Bristol). 2018 Feb;52:102-108. doi: 10.1016/j.clinbiomech.2018.01.018. Epub 2018 Feb 3.
Other Identifiers
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BIO-REB 16-72
Identifier Type: -
Identifier Source: org_study_id
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