title: Comparison between cold water immersion therapy (CWIT) and light emitting diode therapy (LEDT) in short-term skeletal muscle recovery after high-intensity exercise in athletes--preliminary results.
abstract: In the last years, phototherapy has becoming a promising tool to improve skeletal muscle recovery after exercise, however, it was not compared with other modalities commonly used with this aim. In the present study we compared the short-term effects of cold water immersion therapy (CWIT) and light emitting diode therapy (LEDT) with placebo LEDT on biochemical markers related to skeletal muscle recovery after high-intensity exercise. A randomized double-blind placebo-controlled crossover trial was performed with six male young futsal athletes. They were treated with CWIT (5°C of temperature [SD ±1°]), active LEDT (69 LEDs with wavelengths 660/850 nm, 10/30 mW of output power, 30 s of irradiation time per point, and 41.7 J of total energy irradiated per point, total of ten points irradiated) or an identical placebo LEDT 5 min after each of three Wingate cycle tests. Pre-exercise, post-exercise, and post-treatment measurements were taken of blood lactate levels, creatine kinase (CK) activity, and C-reactive protein (CRP) levels. There were no significant differences in the work performed during the three Wingate tests (p > 0.05). All biochemical parameters increased from baseline values (p < 0.05) after the three exercise tests, but only active LEDT decreased blood lactate levels (p = 0.0065) and CK activity (p = 0.0044) significantly after treatment. There were no significant differences in CRP values after treatments. We concluded that treating the leg muscles with LEDT 5 min after the Wingate cycle test seemed to inhibit the expected post-exercise increase in blood lactate levels and CK activity. This suggests that LEDT has better potential than 5 min of CWIT for improving short-term post-exercise recovery.
authors.affiliation: Center for Research and Innovation in Laser, Nove de Julho University (UNINOVE), Rua Vergueiro, 235, 01504-001, São Paulo, SP, Brazil. ernesto.leal.junior@gmail.com
authors.forename: Ernesto Cesar
authors.initials: EC
authors.lastname: Leal Junior
authors.forename: Vanessa
authors.initials: V
authors.lastname: de Godoi
authors.forename: José Luis
authors.initials: JL
authors.lastname: Mancalossi
authors.forename: Rafael Paolo
authors.initials: RP
authors.lastname: Rossi
authors.forename: Thiago
authors.initials: T
authors.lastname: De Marchi
authors.forename: Márcio
authors.initials: M
authors.lastname: Parente
authors.forename: Douglas
authors.initials: D
authors.lastname: Grosselli
authors.forename: Rafael Abeche
authors.initials: RA
authors.lastname: Generosi
authors.forename: Maira
authors.initials: M
authors.lastname: Basso
authors.forename: Lucio
authors.initials: L
authors.lastname: Frigo
authors.forename: Shaiane Silva
authors.initials: SS
authors.lastname: Tomazoni
authors.forename: Jan Magnus
authors.initials: JM
authors.lastname: Bjordal
authors.forename: Rodrigo Alvaro Brandão
authors.initials: RA
authors.lastname: Lopes-Martins
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology*; D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D002097:C-Reactive Protein; D003402:Creatine Kinase; D018592:Cross-Over Studies; D017679:Cryotherapy / Q000009:adverse effects*; D004311:Double-Blind Method; D015444:Exercise / Q000502:physiology*; D006801:Humans; D007101:Immersion; D019344:Lactic Acid / Q000097:blood / Q000378:metabolism; D028022:Low-Level Light Therapy / Q000295:instrumentation* / Q000379:methods; D008297:Male; D018763:Muscle Fatigue / Q000502:physiology; D018482:Muscle, Skeletal / Q000502:physiology*; D013177:Sports / Q000502:physiology; D013223:Statistics as Topic; D013997:Time Factors; D055815:Young Adult
chemical_list: D019344:Lactic Acid; D002097:C-Reactive Protein; D003402:Creatine Kinase