Add external load by holding weights in each hand. Try single-leg calf raises. Or simply progress and test your balance by ...
Calf raises are not a cardio move ... even more. Sit down at a leg press and rest your feet so just your toes are resting at the bottom of the platform. Push back as far as you can while keeping ...
Sometimes we use this machine, leg press, for calf exercises. We like to standing calf raises, however sometimes the weight goes on the shoulder it’s too much for someone that has lower back injury.