Light Therapy and Electrical Stimulation on Functional Performance in Volleyball Athletes

NCT02443701 | Completed DMC

• 1 other identifier: U1111-1169-4661
• Study Type: interventional
• Target: 36
• Locations: 1 country
• Sites: 1

Brief Summary

Background: Volleyball players constantly perform vertical jumps, the higher the height of the jump is better sports performance of these players. Several methods have been tested to improve jumping performance in these players. It will be investigated the addition of electrical stimulation and phototherapy to jump training in volleyball athletes. DESIGN: randomized controlled trial. METHODS: This study will be conducted with 36 male athletes volleyball with minimum experience of 12 months sport. Will be randomized and assigned to 3 groups (control group, NEMES group and group phototherapy). All 36 healthy volleyball athletes who passed the initial selection and agreed to participate in the study, conduct a muscle strength and jump training program, which is held in both legs simultaneously. The 12 healthy athletes electrical stimulation group will perform the same training program described above, but strength training is associated with electrical stimulation. The 12 healthy athletes participating in the phototherapy group will undergo a phototherapy protocol before performing the strength and jump training. All selected participants will undergo an assessment of muscle strength of knee extensors and evaluate the jump. These evaluations were baseline, 6 weeks and 8 weeks after baseline.

Conditions

Muscle Weakness; Sports Performance

Outcome Measures

Primary Outcomes (1)

• Muscle strength measured by dynamometer

  The athletes will be evaluated in 3 phases: initial evaluation (pre-training), immediately after post-training, and a 8-wk follow up. It will be assessed the isometric muscle strength of knee extensors.

  6 weeks

Secondary Outcomes (3)

• Global impression measured by global perceived effect scale

  6 weeks

• Jumping frequency measured by jumping frequency in 2 minutes

  6 weeks

• Jump ability measured by jump ability test

  6 weeks

Study Arms (3)

Exercise

EXPERIMENTAL

All 12 volleyball athletes performed a strength training and jump, to be held in both legs at the same time. The training will be held in a six-week period, a total of 18 training. Athletes will hold a warmup in stationary bike for 6 minutes, maximum isometric strengthening in leg extension (knee positioned at 60 ° of flexion and hip in 75 ° of flexion), 10 repetitions of 10 seconds with 30 seconds interval. After strengthening conduct a complete rest 5 minutes and jump training countermovement in 5 sets of 10 jumps (1 minute interval between each jump).

Other: Exercise

NEMES

EXPERIMENTAL

All 12 volleyball athletes performed a strength training and jump, to be held in both legs at the same time. The training will be held in a six-week period, a total of 18 training. Athletes will hold a warmup in stationary bike for 6 minutes, maximum isometric strengthening in leg extension (knee positioned at 60 ° of flexion and hip in 75 ° of flexion), 10 repetitions of 10 seconds with 30 seconds interval. After strengthening conduct a complete rest 5 minutes and jump training countermovement in 5 sets of 10 jumps (1 minute interval between each jump).The healthy athletes electrical stimulation group will perform the same training program described above, but strength training is associated with electrical stimulation, medium frequency current (1kHz), modulated at 70Hz, cycle Work 10%, intensity used will vary according to the capacity and tolerable for each individua. The stimulated muscle group will be the quadriceps femoris

Other: Exercise; Other: NMES

Phototherapy

EXPERIMENTAL

All 12 volleyball athletes performed a strength training and jump, to be held in both legs at the same time. The training will be held in a six-week period, a total of 18 training. Athletes will hold a warmup in stationary bike for 6 minutes, maximum isometric strengthening in leg extension (knee positioned at 60 ° of flexion and hip in 75 ° of flexion), 10 repetitions of 10 seconds with 30 seconds interval. After strengthening conduct a complete rest 5 minutes and jump training countermovement in 5 sets of 10 jumps (1 minute interval between each jump). The 12 healthy athletes participating in the phototherapy group will undergo a phototherapy protocol before performing the strength and jump training. Phototherapy will be conducted through a cluster with 03 diodes with 850nm wavelength and the following parameters: Power 50mW diode, diode energy by 2J. The application sites will be six points on the belly of the quadriceps femoris muscles bilaterally.

Other: Exercise; Other: LASER

Interventions

Exercise OTHER

Warmup program, maximum isometric strengthening, and jump training

Also known as: Plyometric training

Exercise; NEMES; Phototherapy

LASER OTHER

a cluster with 03 diodes with 850nm wavelength and the following parameters: Power 50mW diode, diode energy by 2J, power per point of 6J, totaling 36J per member

Also known as: Phototherapy

Phototherapy

NMES OTHER

electrical stimulation, medium frequency current (1kHz), Burst duration equal to 2ms with, modulated at 70Hz, cycle Work 10% T-on and T-10 seconds off and 30 seconds intensity used will vary according to the capacity and tolerable for each individual

NEMES

Eligibility Criteria

• Age: 17 Years - 18 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

• Healthy volunteers;
• volleyball players;
• gender male;
• non-smoking;
• aged between 17 and 18;
• weight within 15% variation limit of normal weight for male athletes, taking into account height and physique.

You may not qualify if:

• smoking volunteers;
• history of alcohol or substance abuse;
• diagnosis of cardiac, renal, gastrointestinal, hepatic, pulmonary, neurological, psychiatric, hematological or metabolic disorders; that are not available to participate in all stages of the study.

Sponsors & Collaborators

• Centro de Traumatologia do Esporte: lead

Study Sites (1)

Ronaldo Alves da Cunha

São Paulo, São Paulo, 04504000, Brazil

Location

MeSH Terms

Conditions

Muscle Weakness

Interventions

Exercise; Plyometric Exercise; Lasers; Phototherapy

Condition Hierarchy (Ancestors)

Muscular Diseases; Musculoskeletal Diseases; Neuromuscular Manifestations; Neurologic Manifestations; Nervous System Diseases; Pathologic Processes; Pathological Conditions, Signs and Symptoms; Signs and Symptoms

Intervention Hierarchy (Ancestors)

Motor Activity; Movement; Musculoskeletal Physiological Phenomena; Musculoskeletal and Neural Physiological Phenomena; Exercise Therapy; Rehabilitation; Aftercare; Continuity of Patient Care; Patient Care; Therapeutics; Physical Therapy Modalities; Physical Conditioning, Human; Optical Devices; Equipment and Supplies; Radiation Equipment and Supplies

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Who Masked: INVESTIGATOR, OUTCOMES ASSESSOR
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Coordinator

Study Record Dates

• First Submitted: April 23, 2015
• First Posted: May 14, 2015
• Study Start: July 1, 2015
• Primary Completion: July 1, 2015
• Study Completion: August 1, 2015
• Last Updated: August 13, 2015

Record last verified: 2015-08

Locations

BR (1)