The intake of ashwagandha should be adapted to your personal needs.
If your goal is to relax and reduce the stress caused by exercise, it's best to take between 400 to 900 mg of ashwagandha in the evening.
If you use ashwagandha to improve your athletic performance, you should take 400 to 900 mg of ashwagandha twice per day, preferably in the morning and before your training session.