Time-based Effects of Stretching on Hamstrings Muscle Strength

King Saud University

Status: Completed

Conditions: Stretch

Treatments: Other: Static stretching

Study type: Interventional

Funder types: Other

Identifiers

NCT04448288

RRC-2019-003

Details and patient eligibility

About

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.

Full 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.

Enrollment: 14 patients

Sex: All

Ages: 24 to 30 years old

Volunteers: Accepts Healthy Volunteers

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.

Trial design

Primary purpose: Other

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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14 participants in 1 patient group

Hamstring Group

Experimental group

Description:

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.

Treatment:

Other: Static stretching