Effectiveness of NMES Associated to Vascular Occlusion in Functional Performance and Muscle Hypertrophy in Athlete's

University of Sao Paulo

Status: Completed

Conditions: Muscle Strength; Electric Stimulation Therapy

Treatments: Device: NMES; Device: Vascular Occlusion

Study type: Interventional

Funder types: Other

Identifiers

NCT02406339

U1111-1143

Details and patient eligibility

About

This study evaluates the effect of training with neuromuscular electrical stimulation (NMES) associated with vascular occlusion of the lower limbs, for increased strength and hypertrophy of the quadriceps muscle of professional basketball athletes.

Full description

The pre-season preparation is seen as vital to maximize sports performance. However, there has been much debate on what the best strategy to prepare for use. Basketball is a sports activity of high intensity and volume of jumps, which are generally likely to cause injuries resulting from muscle imbalance and dynamic overload. Primarily in activities with eccentric contraction of the knee extensor muscles. A means of preventing injuries and optimization of sports performance is through strength training. Neuromuscular electrical stimulation (NMES) has been a physical therapy effective in increasing the recruitment of muscle fibers and strength. Another method that has been shown effective in increasing strength and muscle hypertrophy is the association of low intensity training and peripheral vascular occlusion. Therefore, the purpose of this study is to evaluate the effectiveness of neuromuscular electrical stimulation associated to vascular occlusion of lower limb muscle recruitment, strength and muscle hypertrophy. This will be met recruited basketball athletes of high performance, the males, aged between 18 and 30 years and BMI between 20 and 24 Kg/m2. The athletes will be randomized into four groups: group control (n = 15), group electrotherapy (n = 15) and group electrotherapy + vascular occlusion (n = 15). Will be carried out 12 sessions of treatment during the pre-season, and the volunteers evaluated before and after the pre-season and in middle the season, through the following instruments: Isokinetic Dynamometer, Surface Electromyography, Force Platform, Cross Section Area of Muscle, Vertical Jump, Functional Evaluation (Jump, Agility and Balance), Infrared Thermography and Numeric Scale of Pain Evaluation. For data analysis, normality test is used to verify the data distribution and consistent statistical test for the appropriate comparisons within and between groups, and thus considered two factors in the comparisons, time and group. Will adopt a significance level of 5%.

Enrollment: 45 patients

Sex: Male

Ages: 16 to 36 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• The categories Basketball Athletes sub- 19, 21 and professional
• BMI between 20 and 24 kg / m²;
• To present physical and cardiorespiratory fitness, attested by the medical responsible for the team, for conducting evaluations and physical training;

Exclusion criteria

• Previous disease of circulatory order, nervous, metabolic, rheumatic and orthopedic; history of pain or muscle or joint injuries in the lower limbs in the last three months; subjects suffering from muscle fatigue complaint at the time of testing; athletes require the use of stabilizers to perform the tests;
• To present ankle instability assessed by questionnaire Foot and Ankle Outcome Score

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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45 participants in 3 patient groups

Control

No Intervention group

Description:

Are not subject to any intervention.

Electrotherapy

Experimental group

Description:

The athletes will be submitted to NMES of bilateral quadriceps. The stimulation will be held in order to induce the move flexion / extension involuntary knee in extension machine, with resistance of 30% of maximum voluntary strength.

Treatment:

Device: NMES

Electrotherapy + Vascular Occlusion

Experimental group

Description:

The same as in Electrotherapy group, athletes are subjected to NMES associated total vascular occlusion of the members below the level of the groin.

Treatment:

Device: Vascular Occlusion

Device: NMES