Differents Intensities of Passive Stretching on ROM, Neuromuscular and Performance in Soccer Players: A Blinded RCT

Muscle Rigidity Clinical Trial

Official title:

Effects of Different Intensities of Passive Static Stretching on Flexibility, Neuromuscular and Functional Performance in Soccer Athletes: A Blinded, Randomized Controlled Trial.

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT03150563
• Other study ID #: 1.883.129
• Status: Recruiting
• Phase: N/A
• First received: May 6, 2017
• Last updated: May 9, 2017
• Start date: May 9, 2017
• Est. completion date: November 30, 2017

Study information

• Verified date: May 2017
• Source: Universidade Federal do Rio Grande do Norte
• Contact: Ronan R Varela de Melo, Master
• Phone: +5584991366307
• Email: ronanriq[@]gmail.com
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Intensity is a "qualitative" variable of a muscle stretching protocol, which is very little studied due to its inherent characteristic of the individual being stretched. However, it was pointed out as an important factor for ADM gain. To verify the effects of different intensities of static passive stretching on flexibility, neuromuscular and functional performance in soccer athletes.

Description:

It is a randomized, controlled, clinical trial, composed of male subjects, soccer players, randomly divided into 4 groups: Control Group (CG), Experimental Group 1 (GE1), Experimental Group 2 (GE2) And Experimental Group 3 (GE3). Initially, the measurements of flexibility (passive and active), neuromuscular (muscular passive torque, electromyographic activity), and functional (vertical jump and shuttle run test) of non-dominant lower limbs, performed before and immediately after the 1st And 48 hours after the last session. The GC will only be submitted for initial evaluation and final re-evaluation. The experimental groups will undergo a protocol of static passive stretching containing 10 sessions, divided into 3 weekly sessions, with 3 maneuvers of 30 s, but with different intensities (Tolerable Maximum Pain, Maximum No Pain Discomfort, and Stretching Sensation Without Discomfort) Established from a PERFLEX-modified visual scale. Groups with higher static passive stretching intensities (Maximum Tolerable Pain and Maximum Painless Discomfort) are expected to have greater gains in flexibility, with no change in muscle passive torque, electromyographic activity and functional performance, while the intensity of Feeling of Stretching without Discomfort (in a comfort zone) provides a greater decrease of the muscular passive torque, without significant change of the flexibility, in individual athletes of soccer. This work may contribute to the clinical practice of health professionals, since it seeks to improve the elaboration of the clinical prescription of protocols of static passive stretching (whether performed by the individual or not), establishing optimal levels of intensity for a given muscle group.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 40
• Est. completion date: November 30, 2017
• Est. primary completion date: September 30, 2017
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 18 Years to 35 Years

Eligibility

Inclusion Criteria:

• (1) being male; (2) age range between 18 and 35 years of age; (3) Body Mass Index (BMI) between 19 and 27; (4) be a soccer player with 4 to 5x weekly training; (5) not participating in lower limb stretching programs; (6) no history of injury, trauma, previous surgeries and lower limb disease in the last 6 months; (7) absence of musculoskeletal, cardiorespiratory and neurological disorders that prevent the accomplishment of evaluation and treatment protocols; (8) not under the action of drugs that cause muscle relaxation or that may inhibit tonic muscle action (9) present a limitation of WMD (muscular shortening degree) with ischiatibial extensibility of less than 165 degrees of active extension of the knee with the hip Flexed at 90 °.

Exclusion Criteria:

• (1) initiate stretching practice involving LLLs in daily activities outside the collection site during the study period; (2) not performing any of the evaluation and / or intervention procedures; (3) discontinuance in participating in the research.

Related Conditions & MeSH terms

• Contracture
• Contracture of Muscle, Thigh
• Muscle Rigidity
• Strain of Hamstring Muscle (Disorder)

Intervention

Other:
• Passive static stretch
Each experimental group will be submitted to 10 (ten) sessions, with three (3) weekly sessions of static passive stretching, with a 48 h interval between them. Each session will be performed 3 (three) maneuvers containing a duration of 30 seconds, this being the same rest time, performed in all experimental groups.

Locations

Country	Name	City	State
Brazil	Federal University of Rio Grande do Norte	Natal	RN

Sponsors (1)

Lead Sponsor	Collaborator
Universidade Federal do Rio Grande do Norte

Country where clinical trial is conducted

Brazil, 

References & Publications (2)

Apostolopoulos N, Metsios GS, Flouris AD, Koutedakis Y, Wyon MA. The relevance of stretch intensity and position-a systematic review. Front Psychol. 2015 Aug 18;6:1128. doi: 10.3389/fpsyg.2015.01128. eCollection 2015. Review. — View Citation

Behm DG, Bradbury EE, Haynes AT, Hodder JN, Leonard AM, Paddock NR. Flexibility is not Related to Stretch-Induced Deficits in Force or Power. J Sports Sci Med. 2006 Mar 1;5(1):33-42. eCollection 2006. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Range of motion (ROM)	The measurement will be performed in two positions: with hip flexed at 90 ° and with extended leg elevation, using goniometry for measurement.	48 h after intervention
Secondary	Pleasure after stretching program	Each volunteer will be asked shortly after each session what was the pleasure felt in achieving the sensation of stretching, which is indicated by the feeling scale.	1 minute after intervention
Secondary	Pain after stretching session	Measurement from the visual analogue scale of 100 mm.	1 minute after intervention
Secondary	Functional performance	Evaluation of functional performance with measures of vertical jump and shuttle run	48 h after intervention
Secondary	Electromyographic responses of the hamstring	Electromyographic responses of the hamstring muscles in performing knee extension and hip flexion	48 h after intervention
Secondary	Passive torque	Isokinetic performance evaluation	48 h after intervention