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Related Experiment Videos

Acute sleep responses in a normobaric hypoxic tent.

Charles Pedlar1, Gregory Whyte, Stephen Emegbo

  • 1English Institute of Sport, St. Mary's College High Performance Centre, Twickenham, UK. charles.pedlar@eis2win.co.uk

Medicine and Science in Sports and Exercise
|June 11, 2005
PubMed
Summary

Sleeping in a normobaric hypoxic tent at 2500m significantly reduced oxygen saturation and increased heart rate and respiratory disturbances. This may negatively impact sleep quality and recovery for some athletes.

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Area of Science:

  • Sports Science
  • Sleep Physiology
  • Altitude Training

Background:

  • Normobaric hypoxic tents are increasingly used by athletes for altitude simulation.
  • The
  • live high, train low
  • strategy aims to enhance athletic performance.
  • Acute effects of simulated altitude on sleep require further investigation.

Purpose of the Study:

  • To assess the acute effects of sleeping in a normobaric hypoxic tent (NH) at approximately 2500m.
  • To compare sleep physiology and quality markers between NH, normobaric normoxic tent (NN), and baseline (BL) conditions.
  • To investigate the impact of simulated altitude on sleep parameters in recreational athletes.

Main Methods:

  • Eight male recreational athletes participated in a randomized, double-blind crossover study.

Related Experiment Videos

  • Polysomnography was used to measure sleep stages, arterial oxygen saturation (SpO2), heart rate (HR), and Respiratory Disturbance Index (RDI).
  • Subjective sleep quality was assessed using the Leeds Sleep Evaluation Questionnaire (LSEQ).

    • Main Results:

    • NH significantly reduced SpO2 and increased HR compared to NN.
    • NH led to significantly higher RDI (counts.h and total counts) compared to BL.
    • Subjective "behavior following waking" scores were significantly lower in NH compared to BL.

    Conclusions:

    • Sleep in a normobaric hypoxic tent at 2500m can alter sleep parameters in certain individuals.
    • This suggests potential negative impacts on sleep physiology and perceived recovery.
    • Identifying individuals who respond poorly to simulated altitude is crucial for optimizing training regimens.