Key result
Exercise above the blood lactate threshold resulted in a steeper double product slope in all 90 subjects, and the double product break point correlated strongly with the threshold (r=0.900).
Why the study?
Does the double product increase more steeply at work rates above the blood lactate threshold in healthy students?
Population
90 healthy students
Comparison
Stepwise incremental exercise test on a cycle… vs Work rates below the blood lactate threshold
Design
Cross-sectional
Authors
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Supports double product breakpoint for non-invasive threshold estimation in healthy adults; leaves open validation in patients and prospective outcomes.
Observational (n=90)
Does the double product increase more steeply at work rates above the blood lactate threshold in healthy students?
The double product break point during exercise testing is a valid and useful non-invasive marker for determining the blood lactate threshold.
Tanaka et al. (1997) conducted an observational in Healthy (n=90). Exercise above the blood lactate threshold vs. Exercise below the blood lactate threshold was evaluated on Slope of the double product (DP) regression line. Exercise above the blood lactate threshold resulted in a steeper double product slope in all 90 subjects, and the double product break point correlated strongly with the threshold (r=0.900).
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