Effect of passive and active recovery on the resynthesis of muscle glycogen.
ABSTRACT The purpose of this investigation was to determine the effect of passive and active recovery on the resynthesis of muscle glycogen after high-intensity cycle ergometer exercise in untrained subjects. In a cross-over design, six college-aged males performed three, 1-min exercise bouts at approximately 130% VO2max with a 4-min rest period between each work bout. The exercise protocol for each trial was identical, while the recovery following exercise was either active (30 min at 40-50% VO2max, 30-min seated rest) or passive (60-min seated rest). Initial muscle glycogen values averaged 144.2 +/- 3.8 mmol.kg-1 w.w. for the active trial and 158.7 +/- 8.0 mmol.kg-1 w.w. for the passive trial. Corresponding immediate postexercise glycogen contents were 97.7 +/- 5.4 and 106.8 +/- 4.7 mmol.kg-1 w.w., respectively. These differences between treatments were not significant. However, mean muscle glycogen after 60 min of passive recovery increased 15.0 +/- 4.9 mmol.kg-1 w.w., whereas it decreased 6.3 +/- 3.7 mmol.kg-1 w.w. following the 60 min active recovery protocol (P < 0.05). Also, the decrease in blood lactate concentration during active recovery was greater than during passive recovery and significantly different at 10 and 30 min of the recovery period (P < 0.05). These data suggest that the use of passive recovery following intense exercise results in a greater amount of muscle glycogen resynthesis than active recovery over the same duration.
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ABSTRACT: SUMMARY The research was realized by case studies. The object of the research was 22 years old gymnast who graduated during two days two sets on the floor exercises with 30 minute rest. During the first measurement a gymnast inhaled the placebo and subsequently he did the assembly, then we measured the lactate during 1,3,7,15 and 23 minutes after the end of the load. After the last measurement he started inhale concentrate of oxygen and followed the same assembly after which we used same methodology and we measured his lactate. The next day he did the assembly with same load, with those, that at the first assembly was applied the oxygen and during the other the placebo. The results showed lower anaerobic cover after inhalation of oxygen and faster remetabolisation of lactate compared to inhalation of the placebo. KEY WORDS: hyperoxia, set on the floor exercise, recoveryZborník z medzinárodnej vedeckej konferencie Kondičný tréning v roku 2014, Banská Bystrica, SLOVAKIA; 11/2014
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ABSTRACT: KEY POINTS • Recovery from strenuous daily training or competition is improved when athletes consume a high-carbohydrate diet. The most important effect of such a diet is to maximize the stores of glycogen in the muscles. Roughly 10 g carbohydrate per kg body weight should be sufficient to replenish glycogen stores after a tough training session. • Recovery of muscle glycogen can be achieved in 24 h when sufficient dietary carbohydrate is ingested. • Carbohydrate should be consumed immediately after exercise and thereafter at 30-min intervals for about 5 hours. This "early recovery" diet should provide the equivalent of 1-1.2 g of carbohydrate per kg body weight each hour. • Restoration of muscle glycogen stores may take longer when exercise causes muscle damage and soreness. • Rehydration after exercise is optimized when athletes ingest a volume of fluid (a sports drink with sufficient electrolytes is better than water) equivalent to 150% of the body weight deficit.
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ABSTRACT: Many researchers have investigated the effectiveness of contrast water therapy (CWT) or compression stockings (CS) during recovery, using subsequent performance as the principal outcome measure. However, data in the literature are contradictory, mainly because of the methodology used. Purpose: Based on well-controlled performance measures, this study aimed to compare the effects of CWT, CS or passive recovery (PR) on subsequent performance. Methods: After inclusion based on reproducibility criteria (intra-participant variability in performance test lower than the expected differences between the recovery interventions, i.e. 1.5%), 12 competitive male cyclists (peak power output: 5.0 ± 0.2 W/kg; cycling practice: 4.9 ± 0.4 times/week; intra-participant variability: 1.2 ± 0.2%) came to the laboratory three times in a random crossover design. Each time visit, they performed a tiring exercise on a cycle ergometer, followed by a 5-min performance test during which the mean power output was recorded, separated by a 15-min recovery period during which a 12-min PR, CWT (1:2 (cold: 10-12°C to warm: 36-38°C) min ratio) or CS (~20 mmHg) was implemented. Results: Compared with PR (353.8 ± 13.1 W), performance was significantly higher after CWT (368.1 ± 12.3 W) and CS (360.5 ± 14.8 W). Moreover, performance was significantly higher after CWT than after CS. Conclusion: Athletes can use this information as a way of improving their performance in competition format using repeated high-intensity exercises in a short period of time, such as in mountain bike, track or BMX races. Moreover, these data reinforce interest for researchers to consider performance tests with high test-retest reproducibility, especially when small but real benefits are expected.