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Background: Isokinetic evaluation and training are commonly used. Hemodynamic response during this type of exercise is unknown and therefore usually not recommended in some patients (elderly, patients with risk factors or with cardio-vascular disease). The aim of this study was to evaluate the hemodynamic response during a classical testing and training isokinetic session. Method: 20 healthy young male participated to this study. The hemodynamic response wa continuously and non invasively (Task Force Monitor) measured on a Cybex Norm (knee extension and flexion). The hemodynamic parameters were systolic blood pressure (SBP), heart rate (HR) and cardiac output (Q). Results: A low speed (60°/s) test was more exhausting than one at higher speed (180°/s) which is probably related to its duration. Whereas rest periods seemed sufficient for muscle recovery allowing during training, maintenance of performance over the different sets, changes in hemodynamic parameters (HR, SBP & Q) were observed over successive sets and did not recover totally during rest. Systolic ejection volume did neither change nor contribute to the increase of cardiac output (+ 70 to 84% compared to rest). Values measured during test and training were high but not excessive (HR max=135 ± 20 bpm or 70% of HRmax predicted; SBP max =185 ± 26 mmHg; Q=11.2 ± 2.2 l/min). Conclusions: Values measured during test and training are high but not excessive. Isokinetic training in cardio-vascular risk patients should be composed of shorter set duration and longer rest periods as generally applied, without loosing maximal muscle contraction over the entire rage of motion. [ABSTRACT FROM AUTHOR]

Objective. To measure the impact of different recovery periods on systolic blood pressure (SBP) and heart rate (HR) during classical resistance training (RT) modalities Background. Resistance training was introduced into rehabilitation programs to improve the efficiency of traditional training. The impact of different RT modalities on muscular performance is well known but the recovery periods between successive RT sets recommended in the literature varied between 30 s and 5 min. Method. Twenty one healthy subjects were tested while performing a classical RT paradigm: 3 sets of 10 repetitions at 75% of 1-RM, with recovery periods of 30, 60, 90 and 120 s. Results. A recovery period of 30 or 60 s did not allow a return of SBP and HR to resting values. A progressive drift of the values was observed in the successive rests as well as in the successive efforts. A recovery period longer than 60 s (90 and 120 s) allowed a return of SBP and HR to resting values. Conclusions. A recovery period of 90 s or more between successive classical RT sets is recommended in order to avoid excessive SBP and HR elevation. [ABSTRACT FROM AUTHOR]

Background: Resistive training has been introduced in exercise programs to improve the results of traditional rehabilitation. Changes in blood pressure (BP) and heart rate (HR) during resistive have mainly been measured out of the rehabilitation context, using discontinuous monitoring of BP, while exercising small muscular mass during isometric exercise or low intensity contraction.Method: The BP and HR responses to low, moderate and high intensity resistive training were continuously assessed in 21 healthy subjects. The total amount of work was the same for the three modalities, hence the number of repetition was inversely related to exercise intensity.Results: Blood pressure and HR increased from set 1 to set 3 for all 3 training modalities and were highest, intermediate and lowest during low, moderate and high intensity training respectively (all p<0.001).Conclusions: BP and HR changes during resistive training are related principally to exercise duration. Short sets using heavy weights is preferable to limit BP and HR rises. [ABSTRACT FROM AUTHOR]