Relationship between oxygen uptake kinetics and performance in repeated running sprints

Abstract

The purpose of this study was to test the hypothesis that subjects having a shorter time constant for the fast component of VO2 kinetics in a transition from rest to constant exercise would maintain their speed for a longer time during repeated sprint exercise (RSE). Eleven male soccer players completed a graded test, two constant exercises at 60% maximal aerobic speed and RSE, consisting of fifteen 40-m sprints alternated with 25 s of active recovery. All the tests were performed on the field (200 m indoor track). The parameters of the VO2 kinetics (time delay, time constant, and amplitude of the primary phase) during the two constant exercises were modeled. All subjects elicited VO2 during the RSE. A significant correlation was found between VO2 and the relative decrease in speed during the 15 sprints (r=0.71; p < 0.05), but not between VO2 and the cumulated time for the 15 sprints (r=0.48; p > 0.05). There were significant correlations between the time constant of the primary phase and the relative decrease in speed during the 15 sprints (r=0.80; p < 0.01) and the cumulated time for the 15 sprints (r=0.80; p < 0.01). These results suggest that individuals with faster VO2 kinetics during constant load exercise might also have a faster adjustment of VO2 during RSE leading to a shorter cumulated time and a lower relative decrease in speed during the 15 sprints.

The physiological responses to repeated upper-body sprint exercise in highly trained athletes

“…The sprint decrement was on average 12 %, with most of the loss in power occurring during the first five sprints. This decrement is slightly greater than the decrements of 5-10 % found in previous research on repeated sprint exercise in running and cycling using relatively similar protocols (Spencer et al 2005;Perrey et al 2010;Dupont et al 2005). However, even small differences in test protocols (i.e., number of sprints as well as sprint and recovery times) and physiological profiles of the subjects may influence the outcome.…”

Oxygen uptake kinetics in trained adolescent females

“…These findings suggest that the ability to rapidly activate the aerobic energy systems to support intermittent exercise and reduce the reliance on non-aerobic energy sources may be important in delaying the onset of fatigue and improve soccer performance (Rampinini et al, 2010). Further evidence exists to support this theory (Dupont et al, 2005), as a significant correlation was There is evidence from the extant literature to support an increase in muscle oxidative enzyme activity (Eriksson et al 1973;Fournier et al 1982) with training in children and adolescents. Furthermore, such enhancements to oxidative enzyme activity (citrate synthase and 3-hydroxyacylCoA dehyrogenase) have been shown to occur to a greater extent following 16 weeks (1hr per week) of soccer training in recreationally active women (age 19-47 years) compared to a control group engaged in running training only ) A similar study demonstrated that 12 weeks of recreational football training in an adult population resulted in the conversion of Type IIX to Type IIA muscle fibres which retain more characteristics of Type I, oxidative fibres ).…”

“…Hence it might be expected that a history of systematic, high-intensity, intermittent exercise training which characterises soccer-play, will be associated with faster p 2 o V  kinetics. Indeed, a faster fundamental phase time constant derived from moderate intensity exercise, was significantly related to better Yo-Yo IR1 and IR2 soccer field test performance (Rampinini et al, 2010) and reduced time decrements in repeated sprint tests in adult male soccer players (Dupont et al, 2005).…”

A influência de variáveis aeróbias e anaeróbias no teste de “sprints” repetidos

“…Until the present moment, few studies have observed that the aerobic parameters such as ventilatory threshold 15 , VO 2 max 15,17,19 , MAV 11 , velocity in which the VO 2 max is reached (vVO 2 max) 13 , tau [19][20] were correlated with RS performance. However, the variables which signi cantly correlates are not always similar among studies, and thus, it is important to highlight that in the present study, as well as others, none aerobic variable correlated with the TT 10,12,16,[21][22]24 .…”

“…Di erently, some researches have demonstrated negative signi cant correlations between aerobic parameters and decrease in performance 10-11, 13, 15, 20 . Moreover, D et al 20 emphasized that the time constant of the VO 2 kinetics (tau) during submaximal exercise correlated with fatigue on the RS test, suggesting that the rapid activation of the oxidative system is an important mechanism to reduce the RS fatigue.…”