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Recent studies have suggested that dietary inorganic nitrate (NO3 −) supplementation may improve muscle efficiency and endurance exercise tolerance but possible effects during team sport-specific intense intermittent exercise have not been examined. We hypothesized that NO3 − supplementation would enhance high-intensity intermittent exercise performance.(More)
Dietary supplementation with beetroot juice (BR), containing approximately 5-8 mmol inorganic nitrate (NO3(-)), increases plasma nitrite concentration ([NO2(-)]), reduces blood pressure, and may positively influence the physiological responses to exercise. However, the dose-response relationship between the volume of BR ingested and the physiological(More)
It has been suggested that a prior bout of high-intensity exercise has the potential to enhance performance during subsequent high-intensity exercise by accelerating the O(2) uptake (Vo(2)) on-response. However, the optimal combination of prior exercise intensity and subsequent recovery duration required to elicit this effect is presently unclear. Eight(More)
Whether the transition in fatigue processes between "low-intensity" and "high-intensity" contractions occurs gradually, as the torque requirements are increased, or whether this transition occurs more suddenly at some identifiable "threshold", is not known. We hypothesized that the critical torque (CT; the asymptote of the torque-duration relationship)(More)
Dietary nitrate supplementation has been reported to improve short distance time trial (TT) performance by 1–3 % in club-level cyclists. It is not known if these ergogenic effects persist in longer endurance events or if dietary nitrate supplementation can enhance performance to the same extent in better trained individuals. Eight well-trained male cyclists(More)
Dietary nitrate supplementation, which enhances nitric oxide (NO) bioavailability, has previously been shown to contribute to improved exercise performance by reducing both oxygen cost and energy expenditure. In contrast, previous studies have indicated that NO can lower force production in vitro. To examine the role of dietary nitrates in regulating force(More)
_ VO 2max is not altered by self-pacing during incremental exercise: reply to the letter of Alexis R. Mauger Dr. Mauger argues that ''several methodological differences in study design'' can explain why we (Chidnok et al. 2012) were unable to reproduce his findings that a self-paced incremental test produced a higher _ VO 2 max than a conventional(More)
The critical power (CP) is mathematically defined as the power-asymptote of the hyperbolic relationship between power output and time-to-exhaustion. Physiologically, the CP represents the boundary between the steady-state and nonsteady state exercise intensity domains and therefore may provide a more meaningful index of performance than other well-known(More)
A single 3-min all-out cycling test can be used to estimate the power asymptote (critical power, CP) and the curvature constant (W′) of the power–duration relationship for severe-intensity exercise. It was hypothesized that when exercise immediately preceding the 3-min all-out test was performed <CP, the CP and W′ parameters would be unaffected, whereas(More)
It is possible that dietary nitrate (NO3 −) supplementation may improve both physical and cognitive performance via its influence on blood flow and cellular energetics. To investigate the effects of dietary NO3 − supplementation on exercise performance and cognitive function during a prolonged intermittent sprint test (IST) protocol, which was designed to(More)