Over training syndrome and its effects on cortisol, SHBG, and IGF-1; or as they authors call it overreaching. The study contrasted OR versus basic training.
Review of the evidence of OTS versus overreaching. Academic points about the difference really. This are both dysfunctional physiologies and they need to be approached the same.
amino acid supplementation shown to maintain total testosterone levels in resistance training overreaching compared to placebo. This study was small and only lasted 4 weeks.