I really wouldn't exercise on amphetamines, period. If it's a prescribed amount and you're relatively tolerant to the cardiovascular effects, it's a different story. But if you're using them recreationally, don't work out.
Running places obvious risk on the heart.
Lifting weights causes a spike in blood pressure, increased heart rate, etc.
Besides, what's the point? When you lift, you need to eat accordingly, and amp is just going to suppress your diet.