IMT Reduces Blood Lactate Concentration During Volitional Hyperpnoea

"Although reduced blood lactate concentrations have been observed during whole-body exercise following inspiratory muscle training (IMT), it remains unknown whether the inspiratory muscles are the source of at least part of this reduction. This investigation tested the hypothesis that IMT would attenuate the increase in blood lactate concentrations caused by mimicking, at rest, the breathing pattern observed during high-intensity exercise."

Conclusion:

"After 6 weeks, increases in blood lactate concentrations during volitional hyperpnoea were unchanged in the control group. Conversely, following IMT the increase in blood lactate concentrations during volitional hyperpnoea was reduced by 17 ± 37% and 25 ± 34% following 8 and 10 min, respectively (P < 0.05). In conclusion, increases in blood lactate concentrations during volitional hyperpnoea at 85% maximal exercise minute ventilation were attenuated following IMT."

"These findings suggest that the inspiratory muscles were the source of at least part of this reduction, and provide a possible explanation for some of the IMT-mediated reductions in blood lactate concentrations often observed during whole- body exercise."

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