Personally, when I went all-meat, I was still going to the gym and lifting heavy weights. Didn't affect my ability none. In fact, I retained my strength and could lift just as heavy as I did when I weighed 220lbs at my peak (300lbs deadlift was my max at the time). More than that, I even increased the intensity of my workouts, i.e. HITT, more intense drills, quicker motion with same weight, etc.