Activation Patterns of Respiratory Muscles to Loaded Inspiratory Muscle Tests in Healthy Adults Under Different Posture

NCT ID: NCT03729986

Last Updated: 2019-02-12

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 14 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2018-11-01
• Study Completion Date: 2018-12-28

Brief Summary

Whether minimizing sternocleidomastoid (SCM) activation in supine position would increase diaphragm activation during loaded inspiratory muscle tests remains to be determined. Therefore, the purpose is to exam diaphragm and SCM activation during loaded inspiratory muscle tests in sitting and supine position in healthy adults.

Detailed Description

Inspiratory muscle training usually performed in the upright sitting position. In healthy individuals, sternocleidomastoid (SCM) is rarely recruited during tidal breathing, but previous studies have demonstrated SCM activation during loaded inspiratory muscle tests in upright sitting position. Whether minimizing SCM activation in supine position would increase diaphragm activation during loaded inspiratory muscle tests remains to be determined. Therefore, the purpose is to exam diaphragm and SCM activation during loaded inspiratory muscle tests in sitting and supine position in healthy adults.

Conditions

Accessory Muscle

Study Design

• Observational Model Type: OTHER
• Study Time Perspective: CROSS_SECTIONAL

Study Groups

Healthy adults

Healthy subjects without exercise habit that can cooperate with the measurements of this study, loaded inspiratory muscle test.

Loaded inspiratory muscle test

Intervention Type: OTHER

Loaded inspiratory muscle tests will be set at 30% of maximal inspiratory pressure in sitting and supine positions. The orders of the two loaded test conditions will be conducted in random order with at least 20 minute separation. This is an observational study. Subjects will perform only 15 breaths with each loaded test condition to exam the performance of their inspiratory muscles. Loaded inspiratory muscle test is not for training.

Interventions

Loaded inspiratory muscle test

Loaded inspiratory muscle tests will be set at 30% of maximal inspiratory pressure in sitting and supine positions. The orders of the two loaded test conditions will be conducted in random order with at least 20 minute separation. This is an observational study. Subjects will perform only 15 breaths with each loaded test condition to exam the performance of their inspiratory muscles. Loaded inspiratory muscle test is not for training.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• age > 20 years old
• without exercise habit (any exercise that less than 3 days/week)
• can cooperate with the measurements of this study

Exclusion Criteria

• any clinical diagnosis that will influence the measurement, including any history of neuromyopathy
• angina, acute myocardial infarction in the previous one month
• pregnancy
• participated in inspiratory muscle training program in the previous three months
• any psychiatric or cognitive disorders, for example: Mini-Mental State Examination (MMSE) < 24, that will disturb the communication and cooperation of the study

• Minimum Eligible Age: 20 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

National Taiwan University Hospital

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Li-Ying Wang, Phd

Role: STUDY_CHAIR

National Taiwan University

Locations

School and Graduate Institute of Physical Therapy of National Taiwan University

Taipei, Zhongzheng Dist, Taiwan

Countries

Taiwan

Other Identifiers

201807021RINA

Identifier Type: -

Identifier Source: org_study_id