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Post-Exercise Hypotension: Comparison Between Different Intensities Of Exercise On A Treadmill And A Cycle Ergometer

Keywords: Blood Pressure , Hypotension , Aerobic exercise. Press o arterial , Hipotens o , Exercício aeróbio.

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Abstract:

To compare the hypotensive effects of exercise sessions performed on treadmill and cycle ergometer and toverify the infl uence of the intensity of such exercise sessions on post-exercise hypotension (PEH). Ten normotensive malesubjects (24.9 ± 3.9 years; 78.3 ± 9.2 kg; 176.9 ± 4.9 cm) performed 4 exercise sessions on different days: two incrementalexercise sessions on a cycle ergometer and a treadmill running until volitional exhaustion, and two continuous exercisesessions (20 min) on a cycle ergometer and a treadmill at intensities corresponding to 85% of maximal heart rate (max HR)reached during the incremental tests. Systolic (SBP) and diastolic blood pressure (DBP) were measured on resting, at theend of exercises and during the 90 minute post-exercise recovery period. After the incremental and continuous sessions onthe treadmill SBP presented a signifi cant reduction at the 45th and 90th minutes and DBP was reduced throughout the entirepost-exercise recovery period (P < 0.05). Post-exercise SBP hypotension was observed at the 90th min of recovery from theincremental and continuous exercise sessions performed on the cycle ergometer, whereas post-exercise DBP hypotensionwas only observed at the 90th minute of recovery from the continuous submaximal session (p < 0.05). Exercise in the form ofrunning on the treadmill was more effective for inducing PEH than exercise performed on the cycle ergometer. The exerciseintensities studied did not appear to infl uence PEH either after treadmill running or cycle ergometer sessions. RESUMO O estudo teve como objetivo comparar os efeitos hipotensores de sess es de exercícios realizados em esteiraergométrica e cicloerg metro e verifi car a infl uência da intensidade dessas sess es sobre a hipotens o pós-exercício(HPE). Participaram do estudo 10 indivíduos normotensos do sexo masculino (24,9 ± 3,9 anos; 78,3 ± 9,2 kg; 176,9 ± 4,9cm) executaram 4 sess es de exercícios em dias distintos: dois testes incrementais em cicloerg metro e corrida em esteiraergométrica até a exaust o voluntária, e duas sess es de exercício contínuo (20 min) em cicloerg metro e esteira à 85%da freqüência cardíaca máxima (FC máx.) atingida nos testes incrementais. A press o arterial sistólica (PAS) e diastólica(PAD) foram mensuradas em repouso pré-exercício, ao fi nal dos exercícios e durante 90 min de recupera o pós-exercício.Em rela o aos valores de repouso pré-exercício, após as sess es de exercício incremental e contínuo em esteira aPAS se apresentou signifi cativamente reduzida (p < 0,05) aos 45 e 90 min, enquanto a PAD se apresentou dimi

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