The testosterone to cortisol (T/C) ratio is used to assess physiological strain and recovery after exercise. As testosterone is an anabolic hormone and cortisol a catabolic hormone, this ratio is often referred to as the anabolic ratio, and measurement is pivotal for endocrine homeostasis during acute and chronic exercise. Indeed, it has been proposed to be linked to overtraining. Recent research also shows that this ratio is of importance to female athletes.
This test involves performing four saliva samples surrounding a work-out session (immediately before, immediately after, 1 hour after and finally 12 hours after a session). From your four samples, we extract both cortisol and testosterone, yielding a total of eight analyses. Benchmarking your levels before exercise, this test is above all to be used for intra-individual analysis. The reference range for overall testosterone and cortisol are provided, and your T/C parameter will be placed in relation to published literature using this ratio.