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Acquisition and Semi-Automated Analysis of Respiratory Muscle Surface Electromyography
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Does voluntary hypoventilation during exercise impact EMG activity?

Daisuke Kume1, Shogo Akahoshi2, Takashi Yamagata3

  • 1Department of Integrated Arts and Science, National Institute of Technology, Okinawa College, 905, Henoko, Nago, Okinawa 905-2192 Japan.

Springerplus
|March 31, 2016
PubMed
Summary
This summary is machine-generated.

Voluntary hypoventilation (VH) during exercise reduces muscle oxygenation and increases electromyography (EMG) activity. This suggests that breathing strategies can influence muscle engagement during physical activity.

Keywords:
ElectromyographyExerciseHypoventilationHypoxiaMuscle oxygenation

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Area of Science:

  • Exercise Physiology
  • Muscle Physiology
  • Respiratory Physiology

Background:

  • Exercise under hypoxic conditions is linked to reduced muscle oxygenation and potentially enhanced electromyography (EMG) activity.
  • Voluntary hypoventilation (VH) during exercise causes muscle deoxygenation, but its effect on EMG remains unclear.

Purpose of the Study:

  • To investigate the impact of voluntary hypoventilation (VH) on muscle oxygenation and surface EMG during cycling exercise.
  • To determine if altered breathing patterns influence neuromuscular activation.

Main Methods:

  • Seven healthy men performed 5-minute bicycle exercises at 65% peak oxygen uptake under normal breathing (NB) and VH conditions.
  • Simultaneous measurements included muscle oxygenation (oxyhemoglobin, deoxyhemoglobin, total hemoglobin) and vastus lateralis surface EMG.

Main Results:

  • VH significantly reduced oxyhemoglobin and increased deoxyhemoglobin concentrations in the vastus lateralis muscle compared to NB (P < 0.05).
  • No significant difference in total hemoglobin was observed between NB and VH conditions.
  • Integrated EMG activity was significantly higher during exercise under VH compared to NB conditions (P < 0.05).

Conclusions:

  • Voluntary hypoventilation during exercise augments EMG activity in the vastus lateralis muscle.
  • Altered breathing patterns, specifically VH, can enhance neuromuscular recruitment during submaximal exercise.