Key result
Supra-maximal sprints lasting up to 60 seconds at the start of exercise did not significantly alter oxygen uptake or blood lactate accumulation after 10 minutes compared to control (p<0.05).
Why the study?
It was unclear whether sprinting at the start of competitive endurance events has a negative impact on physiological measures of performance.
Does a supra-maximal sprint at the start of endurance exercise affect oxygen uptake and blood lactate accumulation in moderate-well trained males?
Does a supra-maximal sprint at the start of endurance exercise affect oxygen uptake and blood lactate accumulation in moderate-well trained males?
Sprints lasting up to 60 seconds at the start of endurance exercise do not have prolonged negative effects on oxygen uptake or blood lactate accumulation after 10 minutes.
Answers are grounded in this paper and cite their sources.
No modification of warm-up strategies indicated; hypothesis-generating for sprint effects on steady-state metabolism.
Ten males completed an incremental maximal exercise test and three experimental trials (ET) to investigate whether or not sprinting at the start of competitive endurance events has a negative impact on physiological measures of performance. The control ET began with a square-wave transition to a heavy workload, whereas the sprint ETs began with a supra-maximal sprint (110% VO2max), lasting 15 or 60 seconds, before the workload was reduced to a heavy intensity. Oxygen uptake and blood lactate accumulation were significantly elevated (p<0.05) during the first few minutes of the sprint ETs; however, no significant differences were found between any of the ETs after 10 minutes of exercise (p<0.05). Thus, sprints lasting up to 60 seconds do not appear to have prolonged negative effects on physiological measures of performance during subsequent endurance exercise, and may benefit athletes by allowing them to gain positive tactical positioning.
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Miles F. Bartlett (2019) studied Healthy moderate-well trained males (n=10). Supra-maximal sprint at the start of exercise vs. Square-wave transition to a heavy workload (control) was evaluated on Oxygen uptake and blood lactate accumulation (p=<0.05). Supra-maximal sprints lasting up to 60 seconds at the start of exercise did not significantly alter oxygen uptake or blood lactate accumulation after 10 minutes compared to control (p<0.05).
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