Inspiratory muscle warm-up has no impact on performance or locomotor muscle oxygenation during high-intensity intermittent sprint cycling exercise.

Toshiyuki Ohya,Yasuhiro Suzuki,Masahiro Hagiwara

doi:10.1186/s40064-015-1355-2

Toshiyuki Ohya, Yasuhiro Suzuki + Show 1 more

Open Access

https://doi.org/10.1186/s40064-015-1355-2

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Journal: SpringerPlus	Publication Date: Sep 28, 2015
Citations: 39	License type: CC BY 4.0

Affiliation: Japan Sport Council

Abstract

The purpose of this study was to investigate the effect of inspiratory muscle (IM) warm-up on performance and locomotor muscle oxygenation during high-intensity intermittent sprint cycling exercise. Ten subjects performed identical exercise tests (10 × 5 s with 25-s recovery on a cycle ergometer) after performing one of two different IM warm-up protocols. The IM warm-up consisted of two sets of 30 inspiratory efforts against a pressure-threshold load equivalent to 15 % (PLA) or 40 % (IMW) of maximal inspiratory pressure (MIP). MIP was measured with a portable autospirometer. Peak power and percent decrease in power were determined. Oxyhemoglobin (O2Hb) was measured using near-infrared spectroscopy. The MIP increased relative to baseline after IMW (115 ± 21 vs. 123 ± 17 cmH2O, P = 0.012, ES = 0.42), but not after PLA (115 ± 20 vs. 116 ± 17 cmH2O). Peak power (PLA: 10.0 ± 0.6 vs. IMW: 10.2 ± 0.5 W kg−1), percent decrease in power (PLA: 13.4 ± 5.6 vs. IMW: 13.2 ± 5.5 %), and changes in O2Hb levels (PLA: −10.8 ± 4.8 vs. −10.7 ± 4.1 μM) did not differ between the trials. IM function was improved by IMW. However, this did not enhance performance or locomotor muscle oxygenation during high-intensity intermittent sprint cycling exercise in untrained healthy males.

Highlights

The ability to repeat high-intensity short-duration sprints is an important component of fitness for field-based team sports (Mohr et al 2003) such as soccer, rugby, and field hockey
83.9 ± 17.7 32.4 ± 4.1 37.4 ± 3.9 10.2 ± 2.9 findings of this study were: (1) maximal inspiratory pressure (MIP) values were significantly higher after inspiratory muscle (IM) warm-up under IMW conditions than with pressure-threshold load equivalent to % (PLA) conditions; (2) peak power and percent decrease in peak power did not differ between IM warm-up conditions; and (3) mean O2HbΔ was not different between IM warm-up conditions
We hypothesized that IMW would positively influence high-intensity intermittent sprint cycling exercise performance by delaying IM fatigue and thereby attenuating the muscle deoxygenation that occurs during intense exercise

Summary

Introduction

The ability to repeat high-intensity short-duration sprints is an important component of fitness for field-based team sports (Mohr et al 2003) such as soccer, rugby, and field hockey. Warming up has been shown to improve performance during single sprints and during the first in a series of intermittent sprints (Yaicharoen et al 2012). Optimal warm-up is essential for optimal high-intensity exercise performance. It was recently shown that inspiratory muscle (IM) warm-up, in addition to wholebody warm-up, improves exercise performance. Cheng et al (2013) reported less reduction in the saturation index of the leg muscles, assessed by near-infrared spectroscopy (NIRS), during two 6-min submaximal cycling exercise sessions followed by high-intensity intermittent sprint tests (6 × 10 s with 60-s recovery) with IM warm-up than without IM warm-up. The actual effect of IM warm-up on high-intensity intermittent exercise performance remains unclear

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