The Effect of Electrical Stimulation on Blood Lactate after Anaerobic Muscle Fatigue Induced in Taekwondo Athletes

Abstract

Abstract.[Purpose] The aim of this study was to determine the effect of electrical stimulation on blood lactate after anaerobic muscle fatigue was induced in Taekwondo athletes.[Subjects] Twenty-four male collegiate Taekwondo athletes voluntarily participated in this study (from June 7, 2010 to June 18, 2010, a total of 2 weeks). Subjects were randomly divided into three groups of 8: a) Electrical stimulation group (ES) which received electrical muscle stimulation; b) the massage group which received massage; and the control group which took a rest after induction of anaerobic muscle fatigue. [Methods] This study was a double-blind randomized controlled trial. It was conducted at the sports science research laboratory of Kyungwoon University, Gumi, Korea. Muscle fatigue was induced via anaerobic exercise. Blood samples were collected when the athletes were in a relaxed state, immediately after anaerobic exercise, 15 minutes after anaerobic exercise, and 25 minutes after anaerobic exercise.[Results] Repeated measures ANOVA showed statistically significant differences in lactic acid concentration in the blood with time in the three groups, as well as among the three groups. The lactic acid concentrations in the blood was highest immediately after exercise, decreased significantly 15 min after exercise, and further decreased 25 min after exercise. Scheffe's post-hoc test revealed statistically significant differences between the massage group and the control group, and between the ES group and the control group, whereas no statistically significant difference was found between the massage group and the ES group. [Conclusion] Electrical stimulation was shown to enhance muscle fatigue recovery caused by anaerobic exercise by Taekwondo athletes.

Effects of intermittent pneumatic compression vs. neuromuscular electrical stimulation on recovery following anaerobic exercise in male basketball players

“…The NMES groups in the present study was administered a low frequency electrical stimulation during the recovery period showed a significant recovery of blood lactate and anaerobic performance as compared to control group, which is similar to the results found in previous studies [21,24,26,27,30,[38][39][40][41], although some studies have also reported contrasting findings [21,[42][43][44]. IFT used produces biphasic pulses within the tissues & has an advantage in that it does not cause skin irritation unlike some other electrical techniques [45].…”

“…IFT used produces biphasic pulses within the tissues & has an advantage in that it does not cause skin irritation unlike some other electrical techniques [45]. NMES which uses medium frequency alternating current induces vasodilation & increase peripheral blood flow [46,47] & the suction system with an electrode has a massage effect [27]. Also the rest position during NMES favors the resynthesis of PCr [25].…”

“…Participants were instructed to eat as normal and to stay well hydrated & refrain from any form of exercise, Caffeine and alcohol consumption 24 hrs prior to session. The sample size was estimated using data of changes in blood lactate from the study done by Seo et al [27], in which effect of electrical stimulation on blood lactate after anaerobic muscle fatigue was analysed and 6 subjects per group were shown to be necessary based on the effect size of 3.1, alpha level of 0.05 and power (1-beta) of 0.95. Eight subjects each group were used to increase the power of the study.…”

Immediate Effect of Quadriceps Kinesio Taping on the Anaerobic Muscle Power and Anaerobic Threshold of Healthy College Students

“…A 5-second countdown was used to signal to the participants to pedal with all of their strength for 30 seconds immediately after the command "Start." After 30 seconds, the participants were permitted active rest for 10 seconds at 60 rpm and 100 W. Verbal encouragement was given to the participants to exert maximum effort 17) .…”

Effects of self-selected dehydration and meaningful rehydration on anaerobic power and heart rate recovery of elite wrestlers

“…Anaerobic activity causes fatigue because of lactic acid accumulation. Accordingly, the ability to rapidly remove accumulated lactic acid can enhance performance and reduce the risk of injury 2 ) . Furthermore, heart rate recovery is a controversial issue, and obesity level could impact heart rate recovery 3 ) .…”