Answer:
Exercise routinely.
Step-by-step explanation:
In order to avoid pain, you should exercise routinely, because that way, the body will get used to the stretch from exercises. If people don't often exercises, they will fill more pain when they workout, due to the lactic acid, which productions is higher when people don't exercise.
On the other hand, exercising more will overcharge the body, causing too much stress, more than the body can deal with, causing pain. Therefore, the best way is to workout periodically, the body will assimilate slowly the intensity until normality, not causing pain.