If guys who've never trained before do calf raises on a Smith machine twice a week for 10 weeks—going all the way up and down and pushing to exhaustion—they’ll see their calf muscles grow by nearly 7%.

If new guys to lifting do calf raises on a Smith machine and finish each set with their toes pointed all the way up, they’ll gain about 6.7% more calf muscle thickness in 10 weeks with workouts twice a week.

If untrained guys keep doing little extra calf lifts after they can't do any more full ones on a Smith machine, they'll probably grow their calf muscles a bit more over 10 weeks.

If you're doing calf raises and keep going with smaller movements after you're too tired to do full ones, you might build more calf muscle—especially if you do those extra reps when your foot is pointed up.

If untrained guys do extra mini reps on calf raises after failure, pointing their toes upward, they gain more calf muscle than stopping when they can't do any more full reps with toes pointed down.

If untrained guys keep doing partial calf raises after they can't do full ones on a Smith machine, they can nearly double their workout volume, which might help their muscles grow more.