Maximal heart rates and plasma lactate concentrations observed in middle-aged men and women during a maximal cycle ergometer test |
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Authors: | A. M. P. M. Bovens M. A. van Baak J. G. P. M. Vrencken J. A. G. Wijnen F. T. J. Verstappen |
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Affiliation: | (1) Institute of Sports Medicine Limburg, Departments of Human Biology and Movement Sciences, State University of Limburg, Maastricht, The Netherlands;(2) Centre of Public Health Westelijke Mijnstreek, PO Box 99, NL-6160 AB Geleen, The Netherlands |
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Abstract: | 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 (fc, 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 fc 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 fc, max. In our population 88% of the men and 85% of the women met a combination of the following fc, max and [la–]p, 3min criteria: fc, 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 fc, 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. |
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Keywords: | Lactate Heart rate Exercise tests Sex difference Maximal exercise |
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