Inspiratory Muscle Fatigue In Swimmers After A Single 200m Swim

“Inspiratory muscle fatigue may occur in as little as 6 min during high-intensity spontaneously breathing exercise. The aims of this study were to determine whether inspiratory muscle fatigue occurs during swimming exercise and whether inspiratory muscle strength differs between the supine and standing body positions.”

Conclusion:

“Results indicate that a single 200m front-crawl swim corresponding to 90-95% of race pace was sufficient to induce inspiratory muscle fatigue in less than 2.7 min. Furthermore, although diaphragm muscle length is optimized when supine, our results indicate that the force output of the diaphragm and inspiratory accessory muscles is greater when upright than when supine.”

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Inspiratory Muscle Training Improves 100 and 200m Swimming Performance

“Inspiratory muscle training (IMT) has been shown to improve time trial performance in competitive athletes across a range of sports. Surprisingly, however, the effect of specific IMT on surface swimming performance remains un-investigated.”

Conclusion:

“6 weeks of IMT has a small positive effect on swimming performance in club-level trained swimmers in events shorter than 400m.”

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