Time-based Effects of Stretching on Hamstrings Muscle Strength
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- King Saud University
- Enrollment
- 14
- Locations
- 1
- Primary Endpoint
- Change in Maximum voluntary contraction force (MVCF) before and after stretching
Study Overview
Brief Summary
Stretching is reported to have detrimental effects on strength and thus avoided prior to strength training session. Do stretching indeed decreases muscle strength? To examine the time course (immediate, 10- and 20-min post stretching) for the effects of 2, 4, and 8 min long duration of static-stretching (SS) on isometric maximum voluntary contraction (MVC) force of hamstring muscles.
Detailed Description
OBJECTIVE
To examine the time course (immediate, 10- and 20-min post stretching) for the effects of 2, 4, and 8 min long duration of static-stretching (SS) on isometric maximum voluntary contraction (MVC) force of hamstring muscles.
METHODS: Pretest-posttest experimental design. Total of 14 subjects with mean age 25 years participated in three experimental trials on three different days. On day-I for static-stretching for 2 minutes (SS2), day-II for 4 minutes (SS4), and day-III for 8 minutes (SS8). Testing was conducted before (pre), immediately after (post), and at 10 and 20 min post stretching. MVCF was measured using strain gauze as the main outcome measure.
Study Design
- Study Type
- Interventional
- Allocation
- Na
- Intervention Model
- Single Group
- Primary Purpose
- Other
- Masking
- None
Eligibility Criteria
- Ages
- 24 Years to 30 Years (Adult)
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •Subjects used to engage in 1 to 5 hours of physical activity per week. They were not doing stretching exercises regularly.
Exclusion Criteria
- •Subjects having any current injury specific to lower limb joints or current neuromuscular disease were excluded from the study.
Arms & Interventions
Hamstring Group
Pretest-posttest experimental design. Subjects participated in three experimental trials on three different days. On day-I for static-stretching for 2 minutes (SS2), day-II for 4 minutes (SS4), and day-III for 8 minutes (SS8). Testing was conducted before (pre), immediately after (post), and at 10 and 20 min post stretching. MVCF was measured using strain gauze as main outcome measure. The SS trials involved varied repetitions of 30-s static-stretches and 20-s relax period. MVC force was assessed.
Intervention: Static stretching (Other)
Outcomes
Primary Outcomes
Change in Maximum voluntary contraction force (MVCF) before and after stretching
Time Frame: MVCF was measured on 3 different days with each day separated by 3-4 days.
Change in Isometric strength (MVCF) was measured before and after stretching using strain gauge
Secondary Outcomes
No secondary outcomes reported
Investigators
Masood Khan
Principal investigator
King Saud University