Voluntary hyperventilation-induced hypocapnia enhances wingate test performance without altering energy system contributions.
Level 3 - non-randomized controlled study
Controlled within-subject crossover study without stated randomization in the abstract
PubMed 40604959 · doi:10.1186/s13102-025-01217-z
What was done
Seventeen male team-sport athletes completed 30-second Wingate anaerobic tests under two conditions separated by 2 to 3 days: control and pre-exercise voluntary hyperventilation (5 minutes of controlled breathing at 1000 mL tidal volume and 30 breaths·min⁻¹ to induce hypocapnia). Investigators measured peak power, mean power, blood lactate accumulation via capillary samples, and relative energy system contributions (oxidative, glycolytic, ATP-PCr) using breath-by-breath gas analysis.
What was found
Pre-exercise hyperventilation significantly increased relative peak power (12.7 ± 1.55 vs. 11.9 ± 1.05 W·kg⁻¹, p = 0.007) and mean power (9.0 ± 0.65 vs. 8.6 ± 0.67 W·kg⁻¹, p = 0.005) compared to control. No significant differences were observed between hyperventilation and control for oxidative contribution (20.1 ± 3.9% vs. 20.4 ± 2.3%), glycolytic contribution (41.1 ± 4.7% vs. 41.4 ± 3.7%), ATP-PCr contribution (38.9 ± 5.5% vs. 38.4 ± 4.2%), total energy expenditure, or blood lactate accumulation (12.6 ± 1.9 vs. 12.8 ± 1.2 mmol·L⁻¹).
Why it matters
Inducing hypocapnia via acute voluntary hyperventilation provides an endogenous strategy that modestly improves sprint cycling power output without altering macro-level metabolic pathway contributions.
Limits
The study had a small sample size (n = 17) limited to male team-sport athletes. The abstract does not mention whether condition order was randomized or counterbalanced, and proposed physiological mechanisms such as improved buffering or neuromuscular activation were not directly measured.
Cited by
- supports During an all-out 30-second Wingate anaerobic test, the majority of energy is produced via anaerobic (non-oxidative) metabolism.