Article

Exercise training is an effective intervention for treating and preventing
hypertension, but its effects on heart rate (HR) response to exercise and
cardiorespiratory fitness (CRF) of non-hypertensive offspring of hypertensive
parents (FH+) has not been studied. We compared the effects of three times per
week equal-volume high-intensity aerobic interval (AIT) and continuous
moderate-intensity exercise (CME) on HR response to exercise and CRF of FH+.
Forty-four young FH+ women (25.0 +/- 4.4 years) randomized to control (CON; n =
12), AIT (80-90% of VO(2MAX); n = 16), or CME (50-60% of VO(2MAX); n = 16)
performed a graded exercise test (GXT) before and after 16 weeks of follow-up to
evaluate HR response to exercise and several parameters of CRF. Resting, maximal,
and reserve HR did not change after the follow-up in all groups. HR recovery
(difference between HR(MAX) and HR at 1 minute of GXT recovery phase) improved
only after AIT (11.8 +/- 4.9 vs. 20.6 +/- 5.8 bpm, p < 0.01). Both exercise
programmes were effective for improving CRF parameters, but AIT was more
effective than CME for improving oxygen consumption at the respiratory
compensation point (VO(2RCP); 22.1% vs. 8.8%, p = 0.008) and maximal effort
(VO(2MAX); 15.8% vs. 8.0%, p = 0.036), as well as tolerance time (TT) to reach
anaerobic threshold (TT(AT); 62.0 vs. 37.7, p = 0.048), TT(RCP) (49.3 vs. 32.9, p
= 0.032), and TT(MAX) (38.9 vs. 29.2, p = 0.042). Exercise intensity was an
important factor in improving HR recovery and CRF of FH+women. These findings may
have important implications for designing exercise-training programmes for the
prevention of an inherited hypertensive disorder.

Langue : ANGLAIS

Tiré à part : OUI