Effects of training at and above the lactate threshold on the lactate threshold and maximal oxygen uptake |
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Authors: | Joanne Henritze Arthur Weltman Robert L. Schurrer Kevin Barlow |
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Affiliation: | (1) Human Performance Laboratory, University of Colorado, 80 309 Boulder, Colorado;(2) Exercise Physiology Laboratory, Department of Health and Physical Education, University of Virginia, 22 903 Charlottesville, VA;(3) University of Wisconsin, River Falls, 54 022 River Falls, WI;(4) Human Performance Laboratory, University of Colorado, 80 309 Boulder, Colorado, USA |
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Abstract: | Summary Thirty-three college women (mean age=21.8 years) participated in a 5 d·wk–1, 12 week training program. Subjects were randomly assigned to 3 groups, above lactate threshold (> LT) (N=11; trained at 69 watts above the workload associated with LT), =LT (N=12; trained at the work load associated with LT) and control (C) (N=10). Subjects were assessed for , LT, LT/, before and after training, using a discontinuous 3 min incremental (starting at 0 watts increasing 34 watts each work load) protocol on a cycle ergometer (Monark). Respiratory gas exchange measures were determined using standard open circuit spirometry while LT was determined from blood samples taken immediately following each work load from an indwelling venous catheter located in the back of a heated hand. Body composition parameters were determined before and after training via hydrostatic weighing. Training work loads were equated so that each subject expended approximately 1465 kJ per training session (Monark cycle ergometer) regardless of training intensity. Pretraining, no significant differences existed between groups for any variable. Post training the > LT group had significantly higher (13%), (47%) and LT/ (33%) values as compared to C (p<.05). Within group comparisons revealed that none of the groups significantly changed as a result of training, only the > LT group showed a significant increase in (48%) (p<.05), while both the = LT and > LT group showed significant increases in LT/ (= LT 16%, > LT 42% (p<.05)). No differences were found between or within groups post training for body composition parameters. It was concluded that training above the LT results in an improvement in LT and that large improvements in may not be required for large improvements in .Data were collected at the Human Performance Laboratory, University of Colorado |
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Keywords: | Anaerobic threshold Percent body fat |
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