ISSN:
1439-6327
Keywords:
Lactate
;
Heart rate
;
Exercise tests
;
Sex difference
;
Maximal exercise
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary The purpose of this study was to investigate criteria for maximal effort in middle-aged men and women undertaking a maximal exercise test until they were exhausted if no measurements of oxygen uptake are made. A large group of 2164 men and 975 women, all active in sports and aged between 40 and 65 years, volunteered for a medical examination including a progressive exercise test to exhaustion on a cycle ergometer. In the 3rd min of recovery a venous blood sample was taken to determine the plasma lactate concentration ([la−]p, 3min). Lactate concentration and maximal heart rate (f c, max) were lower in the women than in the men (P〈0.001). Multiple regression analyses were performed to assess the contribution of sex to [la−]p, 3 min, independent of age and f c max, It was found that [la−]p,3 min was about 2.5 mmol·l−1 lower in women than in men of the same age and f c, max. In our population 88% of the men and 85% of the women met a combination of the following f c, max and [la−]p, 3min criteria: f c, max equal to or greater than 220 minus age beats·min−1 and/or [la−]p, 3min equal to or greater than 8 mmol·l−1 in the men and f c, max equal to or greater than 220 minus age beats·min−1 and/or [la−]p, 3min equal to or greater than 5.5 mmol·1−1 in the women.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00235107
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