Effects of Stretching on Strength of Proximal and Distal Group of Muscles - A Comparative Study

NCT ID: NCT04453644

Last Updated: 2020-07-01

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 28 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2019-01-23
• Study Completion Date: 2019-09-05

Brief Summary

Muscular flexibility is believed to prevent injuries and improve movement therefore most coaches include stretching exercises in their pre-competition and pre-exercise warm-up routines. One question arises here, should sports persons avoid stretching exercises prior to sporting events thereby exposing themselves to musculoskeletal injuries, or should they continue stretching exercises prior to sporting events and risk losing the maximal performance? The aim of this study is to compare the effects of 2, 4, and 8 min of static stretching (SS) on isometric maximum voluntary contraction (MVCF) force between proximal (Hamstrings) and distal group (Calf) of muscles.

Detailed Description

OBJECTIVE: To compare the effects of 2, 4, and 8 min of static stretching (SS) on isometric maximum voluntary contraction (MVCF) force between proximal (Hamstrings) and distal group (Calf) of muscles.

DESIGN: Two-group pretest-posttest experimental design. METHODS: Each subject visited the Rehabilitation center on three days: On day-I for static stretching for 2 minutes (SS2), day-II for 4 minutes (SS4), and day-III for 8 minutes (SS8). Isometric Maximum Voluntary Contraction Force (MVCF) measurement was done prior (Pre), 0-min, 10-min, and 20-min post-intervention (i.e. stretching). Each visit was separated by a gap of at least 3-4 days. On each visit, each subject underwent (a). Pre-intervention evaluation, (b). Intervention, (c). Post-intervention evaluation. Subjects performed stretching exercises under the supervision of expert Physical Therapist. The outcome assessor who was kept blind to study protocol did all measurements.

Conditions

STRETCHING

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: OTHER
• Blinding Strategy: SINGLE

Study Groups

Group A (Hamstrings)

Hamstring stretching would be done then isometric strength would be measured.

Group Type: EXPERIMENTAL

Muscle static stretching

Intervention Type: OTHER

On day-I: Static Stretching done for 2 minutes (SS2), on day-II: Static Stretching done for 4 minutes (SS4), and on day-III: Static Stretching done for 8 minutes (SS8).

Group B (Calf)

Calf stretching would be done then isometric strength would be measured.

Group Type: EXPERIMENTAL

Muscle static stretching

Intervention Type: OTHER

On day-I: Static Stretching done for 2 minutes (SS2), on day-II: Static Stretching done for 4 minutes (SS4), and on day-III: Static Stretching done for 8 minutes (SS8).

Interventions

Muscle static stretching

On day-I: Static Stretching done for 2 minutes (SS2), on day-II: Static Stretching done for 4 minutes (SS4), and on day-III: Static Stretching done for 8 minutes (SS8).

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

For group A: subjects performed active knee extension test and those lacking at least 20 degrees of active knee extension range, with hip in 90 degree of flexion were selected. For group B (Calf): Subjects performed active foot dorsiflexion in long sitting position with back supported against the wall and those having not more than 20-degree range of motion were selected.

Selected subjects used to engage in 1-5 hours of regular physical activity per week (recreationally active) that does not involve stretching exercise

Exclusion Criteria

Subjects reporting any current or ongoing neuromuscular disease, injury specific to lower limb joints, any apparent limit in knee or ankle ROM and competitive/professional athletes were excluded from study.

• Minimum Eligible Age: 22 Years
• Maximum Eligible Age: 30 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

King Saud University

OTHER

Sponsor Role: lead

Responsible Party

Masood Khan

Researcher

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

King Saud University

Riyadh, , Saudi Arabia

Countries

Saudi Arabia

References

Alghadir AH, Khan M, Quddus N, Chawla C. Effects of different stretch durations on the strength of the proximal and distal group of muscles - a randomized trial. Medicine (Baltimore). 2022 Oct 28;101(43):e31279. doi: 10.1097/MD.0000000000031279.

Reference Type: DERIVED

PMID: 36316911 (View on PubMed)

Other Identifiers

RRC-2019-06

Identifier Type: -

Identifier Source: org_study_id