Lactate threshold determination: a Monte Carlo comparison of two interpolation methods.
A heuristic model of the relation between blood lactate (L) and VO2 during exercise was used to assess the comparative merits of two methods of reference threshold determination: the habitual linear interpolation method (LT), and a new method using inverse parabolic (second degree) interpolation (PT); the new method capitalizes on the demonstrated curvilinear relation between blood lactate and O2 uptake. Both types of interpolated thresholds were computed, and their error evaluated against the "true" 4-mmol lactate threshold. A combined parametric and Monte Carlo investigation showed that parabolic thresholds are generally superior, being less biased and more precise than their linear counterpart.
Laurencelle
L
L
Départment des sciences de l'activité physique, Université du Québec à Trois-Rivières, Canada.
Quirion
A
A
Nadeau
S
S
D015444:Exercise / Q000502:physiology*; D007773:Lactates / Q000097:blood*; D019344:Lactic Acid; D009010:Monte Carlo Method; D010101:Oxygen Consumption; D012016:Reference Values; D012984:Software
D007773:Lactates; D019344:Lactic Acid