It is normal that the arm does not ache after exercise. If the pain persists after exercise, it is either overtraining or severe muscle strain.

The real effect is that after several days of training, muscle strength and girth are increasing bit by bit through rest and nutritional supplement.

Remember: muscles only grow when they are resting. Training only moderately strains and tears muscle fibers, but the human body has the function of automatic repair, and when repairing damaged muscle fibers, it is overcompensation.

If you still don't understand, please ask. I hope I can help you. Hope to adopt. thank you