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37 Influence of between-match training load on match running performance and markers or recovery in team sport athletes
DOMS time course after resistance exercise bouts performed at different intensities and equal total volumes M. Uchida1, C. Ugrinowitsch1, A. Moriscot2 & M. Aoki3* 1 Institute of Biomedical Sciences, University of São Paulo 2 School of Physical Education and Sport, University of São Paulo 3 School of Arts, Science and Humanities, University of São Paulo
Saturday 13 October
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The aim of the study was to verify the effect of resistance exercise bouts (REB) performed at different intensities (50%-1RM, 75%-1RM, 90%-1RM, 110%-1RM - eccentric action) yet keeping similar total volumes (number of sets x number of reps x kg) upon delayed onset muscle soreness (DOMS), creatine kinase activity (CK) and proinflamatory cytokines (IL-1, IL-6 and TNFα). In order to assess DOMS, a visual analogic scale (VAS) was used. IL-1, IL-6 and TNFα were determined by Luminex-based bead array method and CK activity was assessed by a colorimetric assay. Although no difference was observed between intensities at 24 hours after REB, VAS score was augmented for all intensities when compared to pre-REB values (p<0.05). After 48 hours all groups, excepted 90%-1RM, still rated higher VAS scores when compared to pre-REB values (p<0.05). At 72 hours after REB, 110%-1RM intensity still produced higher VAS score, while other conditions returned to baseline values. Although plasma CK activity was not different among conditions, a main time effect was observed (Pre vs. 48h and Pre vs. 72h) (p<0.05). No difference was detected for IL-1, IL-6, and TNFα plasmatic concentrations among conditions and time points. These results suggest that despite similar levels of muscle damage (CK) between different intensities, exclusively eccentric REB (110%-1RM) produces more persistent DOMS. Furthermore, it is noteworthy that REB performed at 90%-1RM induces a shorter DOMS time course than others lower intensities REB (50%-1RM and 75%-1RM).
Influence of between-match training load on match running performance and markers or recovery in team sport athletes
37
A. Coutts1*, K. Slattery1, L. Wallace1 & A. Sirotic1 1 University of Technology, Sydney
No studies have examined the influence of between-match training on subsequent match performance in team sports. The purpose of this study was to determine the effect of HIGH versus LOW between-match training load on match-specific running performance in team sport athletes. Using a randomised cross-over experimental design, seven male team sport athletes completed two, 60-min match simulations, 6 days apart with either HIGH or LOW training load between each match. Distance travelled at various speed ranges, and sprint performance were collected during each match simulation. Free testosterone, cortisol, creatine kinase (CK), lactate dehydrogenase (LDH), and C-reactive protein were measured from venous blood prior to- and post each match simulation, and 24, 48 and 96h following the first match of each training period. Daily measures of five-repeated counter movement jumps and Daily Analysis of Life Demands for Athletes (DALDA) questionnaire were obtained. The HIGH condition completed significantly greater training load (P<0.01) than the LOW condition and resulted in greater CK and LDH in the HIGH condition. However, there were no differences in any other blood or performance measures. The HIGH group reported significantly greater DALDA response than the LOW group during the training period (P<0.05). The LOW condition travelled greater total match distance with higher peak speeds during every sprint during the simulation with lower blood lactate and higher perception of effort (P<0.05). These results show that high training loads completed between matches can reduce match-specific running performance in team sports most likely as a result of increased muscle damage.
Effect of hydrotherapy on the recovery of exercise-induced fatigue and performance.
38
J. Vaile1*, S. Halson1, N. Gill2 & B. Dawson3 Australian Institute Of Sport 2 Waikato Institute of Technology 3 University of Western Australia
1
The purpose of the present study was to investigate the effects of three hydrotherapy interventions on the recovery of performance following exercise-induced fatigue. Twelve endurance trained cyclists completed four experimental trials differing only in recovery intervention: cold water immersion (CWI; 15°C), hot water immersion (HWI; 38°C), contrast water therapy (CWT; 38°C/15°C), or passive recovery (PAS), all performed for 14 min. Each trial comprised five consecutive exercise days each incorporating a testing session of 105 min in duration, consisting of 66 maximal effort sprints of 5-15 sec duration with specific work to rest ratios of 1:6, 1:3, 1:1. Additionally, a total of 9 min sustained effort (time trial) was incorporated into the protocol. Upon the completion of each daily exercise session athletes completed one of the recovery interventions (randomly assigned to each trial). Performance (average power), core temperature (Trec), heart rate (HR), and rate of perceived exertion (RPE) were recorded throughout each testing session. Sprint and time trial performance were significantly enhanced (p<0.05) across the five day trial following CWI and CWT interventions, when compared to HWI and PAS. Additionally, significant differences (p<0.05) in Trec were observed between interventions immediately post recovery and 15 min post recovery, however, no significant differences (p>0.05) were observed in HR or RPE regardless of day of trial (1-5) or intervention. Cold water immersion and CWT appear to aid recovery from repeat high intensity cycling with athletes better able to maintain performance across a five day period, when compared to HWI and PAS.
Effect of cold and contrast water immersion on post-exercise recovery after team game activity
39
B. Dawson1*, J. Ingram1, K. Wallman1 & J. Beilby2 1 University Of Western Australia 2 Sir Charles Gardiner Hospital
This study aimed to compare the efficacy of contrast (hot/cold) water immersion (CWI), cold water immersion and no recovery treatment (control) as post-exercise recoveries following 90 min of exhaustive simulated team sports exercise. Repeated sprint ability (10 x 20 m on 25 s), strength (isometric: quadriceps, hamstrings and hip flexors) and ratings (10 point scale) and indicators of muscle soreness and inflammation (serum creatine kinase and C-reactive protein) were measured before and across the 48 hours post-exercise in 11 recreational male athletes, all with team sports experience. They completed three testing trials, each separated by at least two weeks, with random assignment of post-exercise recovery treatments, which were performed immediately post-exercise and at 24 h. Significant differences were observed between the three recovery treatments in both performance and muscle soreness ratings. In comparison to control and CWI, cold water immersion resulted in significantly lower muscle soreness ratings (p<0.05) at 24 and 48 h and no significant decrements in quadriceps and hamstring strength and repeated sprint ability at 48 h. While no significant differences were found between recovery treatments in creatine kinase and C-reactive protein levels, effect sizes showed a trend for lower percentage increases from pre-exercise levels for both variables after cold water immersion. In contrast, the only clear benefit of CWI over control recovery was a significantly lower (p<0.05) muscle soreness rating at 24 h. It was concluded that cold water immersion following exhaustive simulated team sports exercise offers greater recovery benefits that CWI or control treatments. 23
Saturday 13 October
36
The aim of the study was to verify the effect of resistance exercise bouts (REB) performed at different intensities (50%-1RM, 75%-1RM, 90%-1RM, 110%-1RM - eccentric action) yet keeping similar total volumes (number of sets x number of reps x kg) upon delayed onset muscle soreness (DOMS), creatine kinase activity (CK) and proinflamatory cytokines (IL-1, IL-6 and TNFα). In order to assess DOMS, a visual analogic scale (VAS) was used. IL-1, IL-6 and TNFα were determined by Luminex-based bead array method and CK activity was assessed by a colorimetric assay. Although no difference was observed between intensities at 24 hours after REB, VAS score was augmented for all intensities when compared to pre-REB values (p<0.05). After 48 hours all groups, excepted 90%-1RM, still rated higher VAS scores when compared to pre-REB values (p<0.05). At 72 hours after REB, 110%-1RM intensity still produced higher VAS score, while other conditions returned to baseline values. Although plasma CK activity was not different among conditions, a main time effect was observed (Pre vs. 48h and Pre vs. 72h) (p<0.05). No difference was detected for IL-1, IL-6, and TNFα plasmatic concentrations among conditions and time points. These results suggest that despite similar levels of muscle damage (CK) between different intensities, exclusively eccentric REB (110%-1RM) produces more persistent DOMS. Furthermore, it is noteworthy that REB performed at 90%-1RM induces a shorter DOMS time course than others lower intensities REB (50%-1RM and 75%-1RM).
Influence of between-match training load on match running performance and markers or recovery in team sport athletes
37
A. Coutts1*, K. Slattery1, L. Wallace1 & A. Sirotic1 1 University of Technology, Sydney
No studies have examined the influence of between-match training on subsequent match performance in team sports. The purpose of this study was to determine the effect of HIGH versus LOW between-match training load on match-specific running performance in team sport athletes. Using a randomised cross-over experimental design, seven male team sport athletes completed two, 60-min match simulations, 6 days apart with either HIGH or LOW training load between each match. Distance travelled at various speed ranges, and sprint performance were collected during each match simulation. Free testosterone, cortisol, creatine kinase (CK), lactate dehydrogenase (LDH), and C-reactive protein were measured from venous blood prior to- and post each match simulation, and 24, 48 and 96h following the first match of each training period. Daily measures of five-repeated counter movement jumps and Daily Analysis of Life Demands for Athletes (DALDA) questionnaire were obtained. The HIGH condition completed significantly greater training load (P<0.01) than the LOW condition and resulted in greater CK and LDH in the HIGH condition. However, there were no differences in any other blood or performance measures. The HIGH group reported significantly greater DALDA response than the LOW group during the training period (P<0.05). The LOW condition travelled greater total match distance with higher peak speeds during every sprint during the simulation with lower blood lactate and higher perception of effort (P<0.05). These results show that high training loads completed between matches can reduce match-specific running performance in team sports most likely as a result of increased muscle damage.
Effect of hydrotherapy on the recovery of exercise-induced fatigue and performance.
38
J. Vaile1*, S. Halson1, N. Gill2 & B. Dawson3 Australian Institute Of Sport 2 Waikato Institute of Technology 3 University of Western Australia
1
The purpose of the present study was to investigate the effects of three hydrotherapy interventions on the recovery of performance following exercise-induced fatigue. Twelve endurance trained cyclists completed four experimental trials differing only in recovery intervention: cold water immersion (CWI; 15°C), hot water immersion (HWI; 38°C), contrast water therapy (CWT; 38°C/15°C), or passive recovery (PAS), all performed for 14 min. Each trial comprised five consecutive exercise days each incorporating a testing session of 105 min in duration, consisting of 66 maximal effort sprints of 5-15 sec duration with specific work to rest ratios of 1:6, 1:3, 1:1. Additionally, a total of 9 min sustained effort (time trial) was incorporated into the protocol. Upon the completion of each daily exercise session athletes completed one of the recovery interventions (randomly assigned to each trial). Performance (average power), core temperature (Trec), heart rate (HR), and rate of perceived exertion (RPE) were recorded throughout each testing session. Sprint and time trial performance were significantly enhanced (p<0.05) across the five day trial following CWI and CWT interventions, when compared to HWI and PAS. Additionally, significant differences (p<0.05) in Trec were observed between interventions immediately post recovery and 15 min post recovery, however, no significant differences (p>0.05) were observed in HR or RPE regardless of day of trial (1-5) or intervention. Cold water immersion and CWT appear to aid recovery from repeat high intensity cycling with athletes better able to maintain performance across a five day period, when compared to HWI and PAS.
Effect of cold and contrast water immersion on post-exercise recovery after team game activity
39
B. Dawson1*, J. Ingram1, K. Wallman1 & J. Beilby2 1 University Of Western Australia 2 Sir Charles Gardiner Hospital
This study aimed to compare the efficacy of contrast (hot/cold) water immersion (CWI), cold water immersion and no recovery treatment (control) as post-exercise recoveries following 90 min of exhaustive simulated team sports exercise. Repeated sprint ability (10 x 20 m on 25 s), strength (isometric: quadriceps, hamstrings and hip flexors) and ratings (10 point scale) and indicators of muscle soreness and inflammation (serum creatine kinase and C-reactive protein) were measured before and across the 48 hours post-exercise in 11 recreational male athletes, all with team sports experience. They completed three testing trials, each separated by at least two weeks, with random assignment of post-exercise recovery treatments, which were performed immediately post-exercise and at 24 h. Significant differences were observed between the three recovery treatments in both performance and muscle soreness ratings. In comparison to control and CWI, cold water immersion resulted in significantly lower muscle soreness ratings (p<0.05) at 24 and 48 h and no significant decrements in quadriceps and hamstring strength and repeated sprint ability at 48 h. While no significant differences were found between recovery treatments in creatine kinase and C-reactive protein levels, effect sizes showed a trend for lower percentage increases from pre-exercise levels for both variables after cold water immersion. In contrast, the only clear benefit of CWI over control recovery was a significantly lower (p<0.05) muscle soreness rating at 24 h. It was concluded that cold water immersion following exhaustive simulated team sports exercise offers greater recovery benefits that CWI or control treatments. 23