In:
Medicine & Science in Sports & Exercise, Ovid Technologies (Wolters Kluwer Health), Vol. 53, No. 1 ( 2021-1), p. 174-182
Abstract:
According to current guidelines, the intensity of health-enhancing aerobic exercise should be prescribed using a percentage of heart rate reserve (%HRR), which is considered to be more closely associated (showing a 1:1 relation) with the percentage of oxygen uptake reserve (% V˙ O 2 R) rather than with the percentage of maximal oxygen uptake (% V˙ O 2max ) during incremental exercise. However, the associations between %HRR and % V˙ O 2 R and between %HRR and % V˙ O 2max are under debate; hence, their actual relationships were investigated in this study. Methods Data from each stage of a maximal incremental exercise test performed by 737 healthy and physically inactive participants of the HERITAGE Family Study were screened and filtered then used to calculate the individual linear regressions between %HRR and either % V˙ O 2 R or % V˙ O 2max . For each relationship, the mean slope and intercept of the individual linear regression were compared with 1 and 0 (i.e., the identity line), respectively, using one-sample t -tests. The individual root mean square errors of the actual versus the 1:1 predicted %HRR were calculated for both relationships and compared using a paired-sample t -test. Results The mean slopes (%HRR–% V˙ O 2 R, 0.972 ± 0.189; %HRR–% V˙ O 2max , 1.096 ± 0.216) and intercepts (%HRR–% V˙ O 2 R, 8.855 ± 16.022; %HRR–% V˙ O 2max , −3.616 ± 18.993) of both relationships were significantly different from 1 and 0, respectively, with high interindividual variability. The average root mean square errors were high and revealed that the %HRR–% V˙ O 2max relationship was more similar to the identity line ( P 〈 0.001) than the %HRR–% V˙ O 2 R relationship (7.78% ± 4.49% vs 9.25% ± 5.54%). Conclusions Because both relationships are different from the identity line and using a single equation may not be appropriate to predict exercise intensity at the individual level, a rethinking of the relationships between the intensity variables may be necessary to ensure that the most suitable health-enhancing aerobic exercise intensity is prescribed.
Type of Medium:
Online Resource
ISSN:
1530-0315
,
0195-9131
DOI:
10.1249/MSS.0000000000002434
Language:
English
Publisher:
Ovid Technologies (Wolters Kluwer Health)
Publication Date:
2021
detail.hit.zdb_id:
2031167-9
SSG:
31
Bookmarklink
