Article

The aim of this work was to evaluate the hemodynamic, autonomic, and
metabolic responses during resistance and dynamic exercise before and after an
8-week resistance training program using a low-intensity (30% of 1 repetitium
maximum), high-repetition (3 sets of 20 repetitions) model, added to an aerobic
training program, in a coronary artery disease cohort.
DESIGN: Twenty male
subjects with coronary artery disease (61.1 +/- 4.7 years) were randomly assigned
to a combined training group (resistance + aerobic) or aerobic training group
(AG). Heart rate, stroke volume, cardiac output, minute ventilation, blood
lactate, and parasympathetic modulation indices of heart rate (square root of the
mean squared differences of successive RR intervals [RMSSD] and dispersion of
points perpendicular to the line of identity that provides information about the
instantaneous beat-to-beat variability [SD1]) were obtained before and after an
8-week RT program while performing exercise on a cycle ergometer and a 45-degree
leg press. RESULTS: Resistance training resulted in an increase in maximal and
submaximal load tolerance (P < 0.01), a decreased hemodynamic response (P <
0.01), and a reduction in blood lactate in the combined training group compared
to the aerobic training group during the 45-degree leg press. During exercise on
a cycle ergometer, there was a decreased hemodynamic response and increased
minute ventilation (P < 0.01). The 8-week RT program resulted in greater
parasympathetic tone (RMSSD and SD1) and an increase in the SDNN index during
exercise on a cycle ergometer and 45-degree leg press (P < 0.05). CONCLUSIONS: An
8-week resistance training program associated with aerobic training may attenuate
hemodynamic stress, and modify metabolic and autonomic responses during
resistance exercise. The training program also appeared to elicit beneficial
cardiovascular and autonomic effects during exercise.

Langue : ANGLAIS