Effects of low level laser therapy (808 nm) on physical strength training in humans

Recent studies have investigated whether low level laser therapy (LLLT) can optimize human muscle performance in physical exercise. This study tested the effect of LLLT on muscle performance in physical strength training in humans compared with strength training only. The study involved 36 men (20.8...

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Veröffentlicht in:Lasers in medical science 2011-05, Vol.26 (3), p.349-358
Hauptverfasser: Ferraresi, Cleber, de Brito Oliveira, Taysa, de Oliveira Zafalon, Leonardo, de Menezes Reiff, Rodrigo Bezerra, Baldissera, Vilmar, de Andrade Perez, Sérgio Eduardo, Júnior, Euclides Matheucci, Parizotto, Nivaldo Antônio
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container_title Lasers in medical science
container_volume 26
creator Ferraresi, Cleber
de Brito Oliveira, Taysa
de Oliveira Zafalon, Leonardo
de Menezes Reiff, Rodrigo Bezerra
Baldissera, Vilmar
de Andrade Perez, Sérgio Eduardo
Júnior, Euclides Matheucci
Parizotto, Nivaldo Antônio
description Recent studies have investigated whether low level laser therapy (LLLT) can optimize human muscle performance in physical exercise. This study tested the effect of LLLT on muscle performance in physical strength training in humans compared with strength training only. The study involved 36 men (20.8±2.2 years old), clinically healthy, with a beginner and/or moderate physical activity training pattern. The subjects were randomly distributed into three groups: TLG (training with LLLT), TG (training only) and CG (control). The training for TG and TLG subjects involved the leg-press exercise with a load equal to 80% of one repetition maximum (1RM) in the leg-press test over 12 consecutive weeks. The LLLT was applied to the quadriceps muscle of both lower limbs of the TLG subjects immediately after the end of each training session. Using an infrared laser device (808 nm) with six diodes of 60 mW each a total energy of 50.4 J of LLLT was administered over 140 s. Muscle strength was assessed using the 1RM leg-press test and the isokinetic dynamometer test. The muscle volume of the thigh of the dominant limb was assessed by thigh perimetry. The TLG subjects showed an increase of 55% in the 1RM leg-press test, which was significantly higher than the increases in the TG subjects (26%, P  = 0.033) and in the CG subjects (0.27%, P  
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This study tested the effect of LLLT on muscle performance in physical strength training in humans compared with strength training only. The study involved 36 men (20.8±2.2 years old), clinically healthy, with a beginner and/or moderate physical activity training pattern. The subjects were randomly distributed into three groups: TLG (training with LLLT), TG (training only) and CG (control). The training for TG and TLG subjects involved the leg-press exercise with a load equal to 80% of one repetition maximum (1RM) in the leg-press test over 12 consecutive weeks. The LLLT was applied to the quadriceps muscle of both lower limbs of the TLG subjects immediately after the end of each training session. Using an infrared laser device (808 nm) with six diodes of 60 mW each a total energy of 50.4 J of LLLT was administered over 140 s. Muscle strength was assessed using the 1RM leg-press test and the isokinetic dynamometer test. The muscle volume of the thigh of the dominant limb was assessed by thigh perimetry. The TLG subjects showed an increase of 55% in the 1RM leg-press test, which was significantly higher than the increases in the TG subjects (26%, P  = 0.033) and in the CG subjects (0.27%, P  &lt; 0.001). The TLG was the only group to show an increase in muscle performance in the isokinetic dynamometry test compared with baseline. The increases in thigh perimeter in the TLG subjects and TG subjects were not significantly different (4.52% and 2.75%, respectively; P  = 0.775). 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This study tested the effect of LLLT on muscle performance in physical strength training in humans compared with strength training only. The study involved 36 men (20.8±2.2 years old), clinically healthy, with a beginner and/or moderate physical activity training pattern. The subjects were randomly distributed into three groups: TLG (training with LLLT), TG (training only) and CG (control). The training for TG and TLG subjects involved the leg-press exercise with a load equal to 80% of one repetition maximum (1RM) in the leg-press test over 12 consecutive weeks. The LLLT was applied to the quadriceps muscle of both lower limbs of the TLG subjects immediately after the end of each training session. Using an infrared laser device (808 nm) with six diodes of 60 mW each a total energy of 50.4 J of LLLT was administered over 140 s. Muscle strength was assessed using the 1RM leg-press test and the isokinetic dynamometer test. The muscle volume of the thigh of the dominant limb was assessed by thigh perimetry. The TLG subjects showed an increase of 55% in the 1RM leg-press test, which was significantly higher than the increases in the TG subjects (26%, P  = 0.033) and in the CG subjects (0.27%, P  &lt; 0.001). The TLG was the only group to show an increase in muscle performance in the isokinetic dynamometry test compared with baseline. The increases in thigh perimeter in the TLG subjects and TG subjects were not significantly different (4.52% and 2.75%, respectively; P  = 0.775). Strength training associated with LLLT can increase muscle performance compared with strength training only.</abstract><cop>London</cop><pub>Springer-Verlag</pub><pmid>21086010</pmid><doi>10.1007/s10103-010-0855-0</doi><tpages>10</tpages></addata></record>
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subjects Adolescent
Dentistry
Exercise
Humans
Lasers
Low-Level Light Therapy
Male
Medicine
Medicine & Public Health
Models, Biological
Muscle Strength - physiology
Muscle Strength - radiation effects
Muscle Strength Dynamometer
Muscular system
Optical Devices
Optics
Original Article
Photonics
Quadriceps Muscle - anatomy & histology
Quadriceps Muscle - physiology
Quadriceps Muscle - radiation effects
Quantum Optics
Resistance Training - methods
Therapy
Young Adult
title Effects of low level laser therapy (808 nm) on physical strength training in humans
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