Effects Of IMT Upon Recovery Time During High Intensity, Repetitive Sprint Activity

“This study examined the influence of specific inspiratory muscle training (IMT) upon recovery time during repetitive sprint activity, as well as the physiological and perceptual responses to fixed intensity shuttle running.”

Conclusion:

“Data support existing evidence that specific IMT attenuates the blood lactate and perceptual responses to submaximal endurance exercise. In addition, the present study provides new evidence that IMT improves recovery time during high intensity, intermittent exercise in repetitive sprint athletes.”

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Loading Of Trained Inspiratory Muscles Speeds Lactate Recovery Kinetics

“The purpose of this study was to investigate the effects of inspiratory threshold loading and inspiratory muscle training (IMT) on blood lactate concentration and acid-base balance after maximal incremental cycling.”

Conclusion:

After maximal exercise, inspiratory threshold loading affected lactate recovery kinetics only after IMT. Our data support the notion that the inspiratory muscles are capable of lactate clearance that increases strong ion difference [SID] and reduces plasma [H+]. These effects may facilitate subsequent bouts of high-intensity exercise.”

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IMT Abolishes Blood Lactate Increase Associated With Volitional Hyperpnoea Superimposed On Exercise And Accelerates Lactate And Oxygen Uptake Kinetics At Onset Of Exercise

“The effects were examined of inspiratory muscle training (IMT) upon volitional hyperpnoea-mediated increases in blood lactate during cycling at maximal lactate steady state power, and blood lactate and oxygen uptake kinetics at the onset of exercise.”

Conclusion:

“Following the intervention, maximal inspiratory mouth pressure increased 19% in the IMT group only. Following IMT only, the increase in blood lactate during volitional hyperpnoea was abolished. In addition, the blood lactate and phase II oxygen uptake kinetics time constants at the onset of exercise and the maximal lactate steady state blood lactate were reduced. We attribute these changes to an IMT-mediated increase in the oxidative and/or lactate transport capacity of the inspiratory muscles.”

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Influence Of Different Breathing Frequencies On Severity Of Inspiratory Muscle Fatigue Induced By High-Intensity Front Crawl Swimming

“The aim of this study was to assess the influence of two different breathing frequencies on the magnitude of inspiratory muscle fatigue after high-intensity front crawl swimming.”

Conclusion:

“Data suggested that there is significant global inspiratory muscle fatigue after high-intensity swimming. Inspiratory muscle fatigue is, however, greater when breathing frequency is reduced during high-intensity front crawl swimming. Respiratory muscle training should be used to improve respiratory muscle strength and endurance in swimmers.”

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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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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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Blood Lactate During Recovery From Intense Exercise: Impact Of Inspiratory Loading

“It has long been suggested that inspiratory muscle activity may impact blood lactate levels during the recovery from dynamic exercise. In this study, we tested the hypothesis that inspiratory muscle activation during recovery from intense exercise would contribute to Lactate clearance, thus leading to reduced blood lactate levels.:

Conclusion:

“These data are consistent with the notion that inspiratory muscles may be net consumers of lactate during recovery from intense exercise.”

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Inspiratory Resistive Loading After All-Out Exercise Improves Subsequent Performance

Previous studies have shown that post-exercise inspiratory resistive loading reduces blood lactate. In this study, we tested the hypothesis that inspiratory resistive loading during recovery could improve subsequent exercise performance.

Conclusion:

“Inspiratory resistive loading during recovery from all-out maximal-intensity exercise decreases blood lactate and perception of leg effort with beneficial effects on peak and mean power on subsequent supra-maximal exercise in healthy males. Our results provide rationale for using post-exercise inspiratory resistive loading as an ergogenic aid and future studies should be conducted to better evaluate the mechanisms responsible for this effect.”

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