Key result
Elevated free fatty acids increase cycling lactate threshold by ~11%, whereas high glucose does not.
Why the study?
Does substrate availability (high blood glucose or free fatty acids) alter the lactate threshold during ergometer cycling?
Population
N=9 subjects undergoing ergometer cycling
Comparison
High blood glucose and high blood free fatty… vs Control (C) condition
Design
Other
Authors
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Elevated FFAs may raise lactate threshold in cycling; leaves open non-anoxic mechanisms of lactate production.
Does substrate availability (high blood glucose or free fatty acids) alter the lactate threshold during ergometer cycling?
Absolute Event Rate: 59.8% vs 53.9%
Substrate availability, specifically elevated free fatty acids, can alter the lactate threshold, suggesting muscle anoxia is not solely responsible for lactate production during submaximal work.
Ivy et al. (1981) studied this question. High blood glucose and high blood free fatty acid conditions vs. Control condition was evaluated on Lactate threshold (% VO2 max). Elevation of blood free fatty acid levels significantly increased the lactate threshold during ergometer cycling (59.8% vs 53.9% VO2max in control), whereas high blood glucose had no effect.
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