Article

Exercise training induces several beneficial effects in patients with
chronic heart failure (CHF). This study investigated the effects of
high-intensity aerobic interval training (AIT) compared with combined AIT and
strength training (COM) on early ventilatory and metabolic recovery pattern after
symptom-limited cardiopulmonary exercise testing (CPET) in CHF patients. METHODS:
Stable CHF patients (N = 42; 54 +/- 10 years [mean +/- SD], 35 males)
participated in an exercise training program for 12 weeks, 3 times per week.
Participants were randomly assigned to either AIT (n = 20) or COM group (n = 22).
Cardiopulmonary exercise testing was performed before and after completion of the
program. Primary measurements included absolute and percentage difference of
oxygen uptake, carbon dioxide output, minute ventilation ((Equation is included
in full-text article.)E), tidal volume (VT), respiratory rate, and the
first-degree slope of oxygen uptake ((Equation is included in full-text
article.)O2/t slope) and carbon dioxide output ((Equation is included in
full-text article.)CO2/t slope) during the first minute of recovery after maximal
exercise. RESULTS: The COM group had a greater improvement in the absolute and
the percentage difference of (Equation is included in full-text article.)E (P =
.03 and P = .04, respectively) and respiratory rate (P = .02 and P = .01,
respectively) during the first minute of recovery period after exercise compared
with the AIT group alone. No significant changes were noted for VT measurements.
A significant increase in (Equation is included in full-text article.)CO2/t slope
was observed in COM compared with the AIT group (P = .01). There was a trend for
a greater increase in (Equation is included in full-text article.)O2/t slope in
the COM group (P = .07). CONCLUSIONS: The addition of strength training to AIT
induces significant beneficial effects in terms of ventilatory and metabolic
recovery kinetics than AIT alone in CHF patients, possibly indicating greater
ventilatory efficiency and metabolic improvement.

Langue : ANGLAIS