Acute effect of inspiratory resistive loading on sprint interval exercise performance in team-sport athletes

Ching Feng Cheng, Wei Chieh Hsu, Yu Hsuan Kuo, Tzu Wei Chen, Yu Chi Kuo

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This study examined acute effects of inspiratory resistive loading (IRL) during rest intervals on sprint interval exercise (SIE) performance. In a randomized crossover design, nine collegiate basketball players performed IRL (15 cmH2O) or passive recovery (CON) at 5-min rest intervals during and immediately after 6 sets of a 30-s SIE test. Performance, muscular oxygenation of vastus lateralis, blood lactate and pH were measured at each condition. Blood lactate at 5-min (−20.5 %) and 20-min (−21.3 %) after SIE were significantly lower in IRL than in CON. The pH at 5-min after SIE was significantly higher in IRL than in CON (+0.8 %, p < 0.05). However, the total work in IRL was significantly lower than in CON (−2.7 %, p < 0.05). Average changes in total hemoglobin at rest intervals in IRL were significantly lower than in CON (−34.5 %, p < 0.05). The IRL could attenuate exercise-induced metabolic acidosis; however, the decreased blood flow at rest intervals might increase the physical challenge in SIE.

    Original languageEnglish
    Article number103531
    JournalRespiratory Physiology and Neurobiology
    Volume282
    DOIs
    Publication statusPublished - 2020 Nov

    Keywords

    • Active recovery
    • High-intensity interval training
    • Lactate clearance
    • Near-infrared spectroscopy
    • Wingate test

    ASJC Scopus subject areas

    • Neuroscience(all)
    • Physiology
    • Pulmonary and Respiratory Medicine

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