Figure 2From: Responses to increasing exercise upon reaching the anaerobic threshold, and their control by the central nervous system Proposed relationship between the nervous system and the different means of determining that the AT has been reached. ATsaliva: saliva threshold; ATcatecholamines: catecholamines threshold; ATEMG: electromyographic threshold; ATConconi: heart rate threshold proposed by Conconi; VT2: ventilatory threshold 2; LT: lactate threshold.Back to article page