improvements in Size,Strength,Fat-Loss & Recovery in a 8 week study.
500mg/day for 8 weeks; a study by Choudhary et al. (2015) which found both, increases in VO2max and quality of life of 50 "athletic" individuals
Against that background it seems certainly warranted that Wankhede et al. postulate that their study "confirms previous data regarding the adaptogenic properties of ashwagandha" and it also clearly "suggests it [Ashwaghanda supplementation] might be a useful adjunct to strength training" (Wankhede. 2015)