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

Study Status: Recruiting
Recruit Status: Recruiting
Study Type: Interventional

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

Brief 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.

Detailed Summary: 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.
Sponsor: Universidade Federal do Rio Grande do Norte

Current Primary Outcome: Range of motion (ROM) [ Time Frame: 48 h after intervention ]

The measurement will be performed in two positions: with hip flexed at 90 ° and with extended leg elevation, using goniometry for measurement.


Original Primary Outcome: Same as current

Current Secondary Outcome:

  • Pleasure after stretching program [ Time Frame: 1 minute after intervention ]
    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.
  • Pain after stretching session [ Time Frame: 1 minute after intervention ]
    Measurement from the visual analogue scale of 100 mm.
  • Functional performance [ Time Frame: 48 h after intervention ]
    Evaluation of functional performance with measures of vertical jump and shuttle run
  • Electromyographic responses of the hamstring [ Time Frame: 48 h after intervention ]
    Electromyographic responses of the hamstring muscles in performing knee extension and hip flexion
  • Passive torque [ Time Frame: 48 h after intervention ]
    Isokinetic performance evaluation


Original Secondary Outcome: Same as current

Information By: Universidade Federal do Rio Grande do Norte

Dates:
Date Received: May 6, 2017
Date Started: May 9, 2017
Date Completion: November 30, 2017
Last Updated: May 9, 2017
Last Verified: May 2017