Alen, Reinila, & Reijo (1985) observed that serum testosterone level tended to increase throughout a 26 week cycle of various AAS until abruptly dropping below normal levels during cessation. When athletes discontinue the use of AAS they experience a refractory period where they do not produce physiological amounts of endogenous testosterone (Di Pasquale, 1992a). Anabolic-androgenic steroid can reduce endogenous testosterone, gonadotrophic hormones and sex hormone-binding globulin (Yesalis, Wright, & Bahrke, 1989). Weight trained athletes have been shown to have low serum testosterone concentrations immediately after cessation of an AAS cycle but return to normal within weeks (Alen, Reinila, & Reijo, 1985).
It’s funny, I’m 5′ 8″ 180 LBS and pretty lean. I’ll be 53 in January and in better health and ability to build muscle now than ever before. But I’m definitely a combination of both anabolic and catabolic. That’s because I eat a high protein and nutrient rich diet along with working out 6 days a week. But I find I could never handle big training volumes—and I don’t do any systematic cardio. Just light walking and being out on a bicycle. I definitely want to learn more about this topic Will. Thank you sir!