Ted was a gifted runner. In his late forties his knees began to aggravate him, and they got worse each year. At age 54 his doctor advised him to stop running. He started strength training with the aim of getting back to running.
We worked around his condition for a while and slowly incorporated leg exercises into the routine - leg curl, calf raises, leg press, adduction, abduction, squats, and occasionally partial leg extensions.
Ted wanted to start running again. He did and the next day his was limping again. I told him, “You are able to lift 450 pounds on the leg press to a very deep fatigue to the point where your legs are unable to move, and the next day you have not a hint of pain.” For Ted with adequate rest after strength training he came back stronger each week. With running there was no recovery or improvement, only injury.