A wearable device appears to be just as good at measuring lactate thresholds for endurance runners as older, more complicated methods, according to a new study.
The lactate threshold is when the blood concentration of lactate or lactic acid exponentially increases during exercise, when muscles can’t make enough energy using available oxygen anymore and start to make energy anaerobically, without oxygen. Endurance athletes want to exercise as close to this point as possible without exceeding it.
