[Muscle retraining or aerobic endurance training? What will improve the aerobic capacity of patients with coronary disease in the only 4 weeks?].
OBJECTIVE
The aim of this study was to compare the effects of 4 weeks of CT and AT, which training impulse (total external workload and perceived exertion), are similar on power associated at VO2 peak (pVO2 peak) and cardiorespiratory responses of patient with CAD.


METHOD
Eighteen male with CAD (62 ± 7 years, 175 ± 2 cm, 84 ± 16 kg, fraction of ejection = 0.49 ± 0.16) performed 4 weeks of CT (n = 9) or AT (n = 9). pVO2 peak, maximal and first ventilatory threshold values of oxygen uptake (VO2 peak, VO2-vt) and heart rate (HRmax, HR-vt) were measured before and after training session. Total training impulse (exercise rehabilitation and other paramedical actions) were evaluated and harmonized between AT and CT according to Foster et al. formula (1996) RESULTS: No significant difference were found in training impulse between AT and CT (3650 ± 220 vs 3497 ± 190 U, P = NS). VO2 pic increased after AT (16.9 ± 4.4 vs 18.9 ± 4.9 mL O2/min/kg, P < 0.05) and remained unchanged after CT (17.7 ± 7.8 vs 17.8 ± 7.2, P = NS). Four weeks of training induced significant increase in pVO2 peak, VO2-vt and FC-vt, expressed in absolute or relative value (P < 0,05), without any difference between AT and CT modalities (P = NS).


CONCLUSIONS
Improving pVO2 pic following an exercise training does not necessarily preclude an improvement in coronary VO2 pic. pVO2 peak was not improved with the same cardiorespiratory adaptations between AT and CT. Thus, there seems important to measure gas exchanges of subject with CAD during the incremental test and identify the respective part of muscular and cardiorespiratory functions in exercise exhaustion.