You must do it after workout because their is a cell in everyone's body which is unleashed after strenuous running and working out. This cell starts asking for protein to build muscles so it could cope up with the body's demand. Hope this helps!
This in mind, learning ‘on the job’ is the best approach to developing a new skill. Whether learning to play an instrument, become a nurse, or to speak another language, learning whilst doing<span> is better than theory alone</span>