Investigations of the lactate minimum test.
|Authors||Johnson, Michael A., Sharpe, Graham R. and Brown, Peter I.|
We evaluated: the agreement between lactate minimum and maximal lactate steady state (MLSS) cycling powers (study 1); whether rates of change of blood lactate concentration during the lactate minimum test reflect that of constant power exercise (study 2); whether the lactate minimum power is influenced by the muscle groups used to elevate blood lactate concentration (study 3). Study 1: 32 subjects performed a lactate minimum test comprising a lactate elevation phase, recovery phase, and incremental phase (five 4 min stages); MLSS was subsequently determined. Study 2: 8 subjects performed a lactate minimum test and five 22 min constant power tests at the incremental phase exercise intensities. Study 3: 10 subjects performed two identical lactate minimum tests, except during the second test the lactate elevation phase comprised arm-cranking. Lactate minimum and MLSS powers demonstrated good agreement (mean bias+/-95% limits of agreement: 2+/-22 W). Rates of change of blood lactate concentration during each incremental phase stage and corresponding constant power test did not correlate. Lactate minimum power was lowered when arm-cranking was used during the lactate elevation phase (157+/-29 vs. 168+/-21 W; p<0.05). The lactate elevation phase modifies blood lactate concentration responses during the incremental phase, thus good agreement between lactate minimum and MLSS powers seems fortuitous.
|Keywords||Adolescent; Adult; Arm; Bicycling; Exercise test; Humans; Lactic acid; Leg; Male; Young adult|
|Journal||International Journal of Sports Medicine|
|Digital Object Identifier (DOI)||https://doi.org/10.1055/s-0028-1119404|
|Web address (URL)||http://hdl.handle.net/10545/292752|
|Publication dates||Jun 2009|
|Publication process dates|
|Deposited||24 May 2013, 14:52|
Archived with thanks to International journal of sports medicine
|Contributors||University of Derby, Department of Sport and Exercise|
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