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Postexercise hypotension and related hemodynamic responses to cycling under heat stress in untrained men with elevated blood pressure.
Cunha, Felipe A; Farinatti, Paulo; Jones, Helen; Midgley, Adrian W.
Afiliação
  • Cunha FA; Postgraduate Program in Exercise Science and Sports, University of Rio de Janeiro State, Rio de Janeiro, Brazil.
  • Farinatti P; Laboratory of Physical Activity and Health Promotion, University of Rio de Janeiro State, Rio de Janeiro, Brazil.
  • Jones H; Postgraduate Program in Exercise Science and Sports, University of Rio de Janeiro State, Rio de Janeiro, Brazil.
  • Midgley AW; Laboratory of Physical Activity and Health Promotion, University of Rio de Janeiro State, Rio de Janeiro, Brazil.
Eur J Appl Physiol ; 120(5): 1001-1013, 2020 May.
Article em En | MEDLINE | ID: mdl-32189061
PURPOSE: To investigate the effect of heat stress on postexercise hypotension. METHODS: Seven untrained men, aged 21-33 years, performed two cycling bouts at 60% of oxygen uptake reserve expending 300 kcal in environmental temperatures of 21 °C (TEMP) and 35 °C (HOT) in a randomized, counter-balanced order. Physiological responses were monitored for 10-min before and 60-min after each exercise bout, and after a non-exercise control session (CON). Blood pressure (BP) also was measured during the subsequent 21-h recovery period. RESULTS: Compared to CON, systolic, and diastolic BPs were significantly reduced in HOT (Δ = - 8.3 ± 1.6 and - 9.7 ± 1.4 mmHg, P < 0.01) and TEMP (Δ = - 4.9 ± 2.1 and - 4.5 ± 0.9 mmHg, P < 0.05) during the first 60 min of postexercise recovery. Compared to TEMP, rectal temperature was 0.6 °C higher (P = 0.001), mean skin temperature was 1.8 °C higher (P = 0.013), and plasma volume (PV) was 2.6 percentage points lower (P = 0.005) in HOT. During the subsequent 21-h recovery period systolic BP was 4.2 mmHg lower in HOT compared to CON (P = 0.016) and 2.5 mmHg lower in HOT compared to TEMP (P = 0.039). CONCLUSION: Exercise in the heat increases the hypotensive effects of exercise for at least 22 h in untrained men with elevated blood pressure. Our findings indicate that augmented core and skin temperatures and decreased PV are the main hemodynamic mechanisms underlying a reduction in BP after exercise performed under heat stress.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ciclismo / Exercício Físico / Resposta ao Choque Térmico / Hipotensão Pós-Exercício / Hemodinâmica / Hipertensão Tipo de estudo: Clinical_trials Limite: Adult / Humans / Male Idioma: En Revista: Eur J Appl Physiol Assunto da revista: FISIOLOGIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha
Texto completo
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Imprimir
XML
PubMed Links
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ciclismo / Exercício Físico / Resposta ao Choque Térmico / Hipotensão Pós-Exercício / Hemodinâmica / Hipertensão Tipo de estudo: Clinical_trials Limite: Adult / Humans / Male Idioma: En Revista: Eur J Appl Physiol Assunto da revista: FISIOLOGIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha