Contracture of Muscle, Thigh, Muscle Rigidity, Strain of Hamstring Muscle (Disorder)
Conditions
Keywords
Stretching, Stretching sensation, Isokinetic dynamometry, Stretching load.
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 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.
Interventions
OTHERPassive 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.
Sponsors
Universidade Federal do Rio Grande do Norte
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Investigator)
Masking description
The randomization process of the sample will be carried out through the electronic website http://www.randomization.com, carried out by a subject external to the experimental and evaluation procedures. With this data, the site will generate a specific coding for each group and will randomly distribute the subjects into four groups: Control Group (GC), Experiment Group 1 (GE1), Experiment Group (GE2) and Experiment Group 3 (GE3). The distribution will be kept in an opaque and sealed envelope, being revealed only to P2 only at the time of intervention. The P1, who will carry out the measurements, will not know to which group the individual belongs. To maintain the blinding procedure of the study, each individual at the time of intervention will spend 10 minutes in the intervention room (being 4 minutes for preparation and 6 minutes for intervention) and each group will have a corresponding color for the convenience of P2 White, blue, green and yellow).
Eligibility
Sex/Gender
MALE
Age
18 Years to 35 Years
Healthy volunteers
Yes
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.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Range of motion (ROM) | 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. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Pleasure after stretching program | 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 | 1 minute after intervention | Measurement from the visual analogue scale of 100 mm. |
| Functional performance | 48 h after intervention | Evaluation of functional performance with measures of vertical jump and shuttle run |
| Electromyographic responses of the hamstring | 48 h after intervention | Electromyographic responses of the hamstring muscles in performing knee extension and hip flexion |
| Passive torque | 48 h after intervention | Isokinetic performance evaluation |
Countries
Brazil
Contacts
Primary ContactRonan R Varela de Melo, Master
Backup ContactGlauko A Figueiredo, Master
Outcome results
None listed