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Postexercise hypotension after maximal short-term incremental exercise depends on exercise modality.

Felipe A Cunha1, Adrian W Midgley, Pedro P Soares

  • 1Medical Sciences Graduate Program, Faculty of Medical Sciences, University of Rio de Janeiro State, Rio de Janeiro, Brazil., Physical Activity and Health Promotion Laboratory, University of Rio de Janeiro State, Rio de Janeiro, Brazil.

Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquee, Nutrition Et Metabolisme
|May 8, 2015
PubMed
Summary

Exercise mode significantly impacts postexercise hypotension (PEH) in healthy men. Running elicits greater PEH, primarily driven by reduced systemic vascular resistance and increased sympatho-vagal balance.

Keywords:
cardiovascular physiologyenergy expenditureergometryergométrieheart rate variabilityla physiologie cardiovasculairela sensibilité baroréflexe spontanéela variabilité de la fréquence cardiaqueles dépenses d’énergiespontaneous baroreflex sensitivity

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Area of Science:

  • Cardiovascular Physiology
  • Exercise Science
  • Autonomic Neuroscience

Background:

  • Postexercise hypotension (PEH) is a phenomenon of reduced blood pressure following exercise.
  • The influence of different exercise modalities on PEH magnitude and underlying physiological mechanisms remains incompletely understood.

Purpose of the Study:

  • To investigate the effects of maximal cardiopulmonary exercise testing (CPET) via cycling, walking, and running on PEH.
  • To identify the determinants of PEH, including systemic vascular resistance (SVR) and autonomic function.

Main Methods:

  • Twenty healthy men underwent three maximal CPETs (cycling, walking, running) in a randomized order.
  • Measurements included blood pressure, heart rate, cardiac output, SVR, spontaneous baroreflex sensitivity (BRS), and heart rate variability (HRV) for 60 minutes post-exercise.
  • Total exercise volume (energy expenditure during CPET plus recovery) was calculated.

Main Results:

  • Total exercise volume was highest during running CPET.
  • Significant PEH, characterized by reduced systolic blood pressure, was observed only after running CPET.
  • Post-exercise, heart rate and cardiac output increased, while SVR decreased across all modalities.
  • BRS and HRV decreased, and sympatho-vagal balance (LF:HF ratio) increased, particularly after running.
  • Changes in SVR, BRS, and sympathetic activity correlated with blood pressure variations.

Conclusions:

  • Exercise mode and total exercise volume are key determinants of PEH magnitude in healthy men.
  • Running-induced PEH is primarily linked to decreased SVR and heightened sympatho-vagal balance, potentially a reflex response to peripheral vasodilation.