Key result
Both endurance and sprint interval training similarly increased VO2peak at the group level, but individual responses varied significantly between protocols, with all participants responding to at least one variable when exposed to both.
Why the study?
Does sprint interval training compared to endurance training elicit different individual adaptive responses in VO2peak, lactate threshold, and submaximal heart rate in recreationally active adults?
Population
21 recreationally active adults
Comparison
Sprint interval training for 3 weeks vs Endurance training for 3 weeks in a randomized…
Design
RCT, randomized crossover study design
Follow-up
3 weeks per intervention
Authors
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Switching modalities may overcome non-response; extends RCT evidence on high individual variability in cardiorespiratory adaptations.
RCT (n=21)
Open-label
Randomized crossover
No
Does sprint interval training compared to endurance training elicit different individual adaptive responses in VO2peak, lactate threshold, and submaximal heart rate in recreationally active adults?
Absolute Event Rate: 3.1% vs 3.1%
p-value: p=<0.05
Individual physiological responses to exercise are highly variable, and non-response to one training modality (endurance or sprint interval) can often be overcome by switching to the other.
Bonafiglia et al. (2016) conducted an RCT in Healthy recreationally active adults (n=21). Sprint interval training (SIT) vs. Endurance training (END) - 30 minutes at ~65% VO2peak work rate, 4 days/week was evaluated on VO2peak (L/min) (p=<0.05). Both endurance and sprint interval training similarly increased VO2peak at the group level, but individual responses varied significantly between protocols, with all participants responding to at least one variable when exposed to both.
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