The Effect Of IMT Upon Maximum Lactate Steady-State And Blood Lactate Concentration

“Several studies have reported that improvements in endurance performance following respiratory muscle training (RMT) are associated with a decrease in blood lactate concentration. This study examined whether pressure threshold inspiratory muscle training (IMT) elicits an increase in the cycling power output corresponding to the maximum lactate steady state.

Conclusion:

“Data supports previous observations that IMT results in a decrease in blood lactate concentration at a given intensity of exercise. That such a decrease in blood lactate concentration was not associated with a substantial (>2.5%) increase in maximum lactate steady state power is a new finding suggesting that RMT-induced increases in exercise tolerance and reductions in blood lactate concentration are not ascribable to a substantial increase in the ‘lactate threshold’.

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Respiratory Muscle Training in Healthy Humans: Resolving the Controversy

“An overview of the literature that rationalizes contradictory findings about respiratory muscle training in healthy people.”

Conclusion:

“It is likely that the ergogenic effect of respiratory muscle training (RMT) has a multifactorial etiology that may include:

  1. The direct effect of RMT upon respiratory muscle fatigue
  2. RMT’s indirect effects upon improving blood flow distribution to limb locomotor muscles in heavy exercise
  3. RMT’s direct and indirect effect upon the intensity with which both respiratory and peripheral efforts are perceived.”

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IMT Improves Cycling Time-Trial Performance And Anaerobic Work Capacity But Not Critical Power

This study “examined whether inspiratory muscle training (IMT) improved cycling time-trial performance and changed the relationship between limit work and limit time, which is described by the parameters critical power and anaerobic work capacity.”

Conclusion:

“These data provide novel evidence that improvements in constant-power and cycling time-trial performance following IMT in cyclists may be explained, in part, by an increase in anaerobic work capacity.”

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