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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
Online ISSN 1827-1928
EXCERCISE PHYSIOLOGY AND BIOMECHANICS
Esco M. R., Williford H. N.
Human Performance Laboratory Auburn University Montgomery, Montgomery, AL, USA
Aim: This investigation examined the association between aerobic fitness, race, and heart rate recovery.
Methods: Forty white and 40 black subjects participated in the study and were group matched based on age and maximal oxygen consumption (VO2max) which was determined via a maximal graded exercise test on a treadmill. Heart rate recovery was evaluated at 1-minute (HRR1) and at 2-minutes (HRR2) during an active cool-down period. The subjects were divided by race and whether they were above (A) or below (B) the referenced 50th percentile for VO2max for men age 20 – 29 years.
Results: When evaluating each race separately, the white men who were in the A group had significantly faster HRR1 (18.2 ± 5.9 beats.min-1 in A versus 16.7 ± 6.0 beats.min-1 in B) and HRR2 (40.9 ± 10.3 beats.min-1 in A versus 32.1 ± 8.5 beats.min-1 in B) compared to the white men in the B group. However, there was no significant difference in either HRR1 (18.2 ±5.9 beats.min-1 in A versus 16.7±6 beats.min-1 in B) or HRR2 (43.1±10.3 beats.min-1 in A versus 44.4.6±8.2 beats.min-1 in B) between the A and B groups in the black men. The only significant correlation existed between VO2max and HRR2 in the white subjects (r=0.33, P<0.05).
Conclusion: The results of this study suggest that HRR is associated with aerobic fitness in white men but not in black men.