Reliability of the calculated maximal lactate steady state in amateur cyclists
Journal Title: Biology of Sport - Year 2015, Vol 32, Issue 2
Abstract
Complex performance diagnostics in sports medicine should contain maximal aerobic and maximal anaerobic performance. The requirements on appropriate stress protocols are high. To validate a test protocol quality criteria like objectivity and reliability are necessary. Therefore, the present study was performed in intention to analyze the reliability of maximal lactate production rate (VLa[sub]max[/sub]) by using a sprint test, maximum oxygen consumption (VO[sub]2[/sub][sub]max[/sub]) by using a ramp test and, based on these data, resulting power in calculated maximum lactate-steady-state (PMLSS) especially for amateur cyclists. All subjects (n=23, age 26 ± 4 years) were leisure cyclists. At three different days they completed first a sprint test to approximate VLa[sub]max[/sub]. After 60 min of recreation time a ramp test to assess VO[sub]2[/sub][sub]max[/sub] was performed. The results of VLa[sub]max[/sub]-test and VO[sub]2max[/sub]-test and the body weight were used to calculate PMLSS for all subjects. The intra class correlation (ICC) for VLa[sub]max[/sub] and VO2[sub]max[/sub] was 0.904 and 0.987, respectively, coefficient of variation (CV) was 6.3 % and 2.1 %, respectively. Between the measurements the reliable change index of 0.11 mmol∙l[sup]-1[/sup]∙s[sup]-1[/sup] for VLa[sub]max[/sub] and 3.3 ml∙kg[sup]-1[/sup]∙min[sup]-1[/sup] for VO[sub]2[/sub][sub]max[/sub] achieved significance. The mean of the calculated PMLSS was 237 ± 72 W with an RCI of 9 W and reached with ICC = 0.985 a very high reliability. Both metabolic performance tests and the calculated PMLSS are reliable for leisure cyclists
Authors and Affiliations
Jennifer Adam, Matthias Oehmichen, Eva Oehmichen, Janine Rother, Ulrike Müller, Thomas Hauser, Henry Schulz
Keywords
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