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Effects of Light-Emitting Diode Therapy on the Performance of Biceps Brachii Muscle of Young Healthy Males After 8 Weeks of Strength Training: A Randomized Controlled Clinical Trial
- Source :
- Journal of strength and conditioning research. 33(2)
- Publication Year :
- 2019
-
Abstract
- Vieira, KVSG, Ciol, MA, Azevedo, PH, Pinfildi, CE, Renno, ACM, Colantonio, E, and Tucci, HT. Effects of light-emitting diode therapy on the performance of biceps brachii muscle of young healthy males after 8 weeks of strength training: a randomized controlled clinical trial. J Strength Cond Res 33(2): 433-442, 2019-We assessed the effect of adding light-emitting diode therapy (LEDT) to an 8-week strength training of biceps brachii in healthy young males. Forty-five participants were randomized into training plus LEDT, training plus sham LEDT, and control groups (n = 15 each). Individuals in the LEDT groups participated in strength training performed in a Scott machine at their maximum number of elbow flexion-extension repetitions. The LEDT was applied to biceps brachii of dominant limb at the end of training sessions (device "on" for LEDT and "off" for sham LEDT). Training loads were re-evaluated every 2 weeks. Controls did not receive training during 8 weeks. All groups were evaluated for 1 repetition maximum (1RM) and fatigue at baseline and 8 weeks. Additionally, the 2 LEDT groups were evaluated every 2 weeks for 1-RM and number of elbow flexion-extension repetitions. The groups were statistically different in mean difference and mean percent change of 1-RM from baseline to week 8 (p < 0.001). Analyzing the 2 LEDT groups, we found an interaction between group and time (p = 0.02), with a slightly faster increase in 1-RM for the LEDT than the sham LEDT. Over time, both groups decreased the number of repetitions of elbow flexion-extension (differences not statistically significant), possibly because of the increase of load over time. We found no difference in change of fatigue index among the 3 groups. Our study showed potential benefits to 1RM when LEDT is applied after a strength training session. Future studies might assess whether different doses of LEDT can reduce fatigue in strength training.
- Subjects :
- Adult
Male
medicine.medical_specialty
020205 medical informatics
Adolescent
Strength training
Elbow
Repetition maximum
Physical Therapy, Sports Therapy and Rehabilitation
Light-Emitting Diode Therapy
02 engineering and technology
Biceps
law.invention
030207 dermatology & venereal diseases
03 medical and health sciences
Young Adult
0302 clinical medicine
Randomized controlled trial
law
0202 electrical engineering, electronic engineering, information engineering
Medicine
Humans
Orthopedics and Sports Medicine
Muscle Strength
Low-Level Light Therapy
Muscle, Skeletal
Biceps brachii muscle
business.industry
Resistance Training
General Medicine
Clinical trial
medicine.anatomical_structure
Muscle Fatigue
Physical therapy
business
Subjects
Details
- ISSN :
- 15334287
- Volume :
- 33
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Journal of strength and conditioning research
- Accession number :
- edsair.doi.dedup.....815f5595feec7954604555f18ee45783