Should I do calf raises with straight or bent knees?

The machine calf raise is performed with straight legs to emphasize the gastrocnemius, the larger outer calf muscle. Bent-knee variations like seated calf raises target the soleus more directly, so including both variations provides complete calf development.

How do I prevent my calves from cramping during calf raises?

Cramping often results from inadequate warm-up, dehydration, or jumping to heavy weight too quickly. Start with lighter sets to prepare the muscles, ensure proper hydration and electrolyte balance, and gradually increase resistance across your working sets.

Why are my calves not growing from calf raises?

Calves often require high training volume and frequency due to their endurance-oriented fiber composition and daily use. Try training calves two to three times per week with varied rep ranges, ensuring you use full range of motion and progressive overload over time.

Calf Raise (Machine)

The calf raise machine is an isolation exercise that targets the gastrocnemius and soleus muscles by lifting weight through plantar flexion of the ankle. It suits lifters at any level who want to build calf size and strength with stable, controlled resistance.

Muscle group: Legs
Primary muscles: calves
Equipment: Machine

How to do the Calf Raise (Machine)

Position yourself in the calf raise machine with shoulders under the pads and balls of your feet on the platform, heels hanging off the edge.
Lower your heels below the platform level to achieve a full stretch in your calves.
Press through the balls of your feet to raise your heels as high as possible, contracting your calves at the top.
Pause briefly at the peak contraction, then lower your heels back down under control to the stretched position.
Repeat for the prescribed number of repetitions, maintaining constant tension throughout the set.

Form tips

Keep your legs straight but not locked to maintain tension on the calves rather than shifting load to the knees.
Move through the fullest range of motion possible, emphasizing both the deep stretch at the bottom and maximum contraction at the top.
Control the descent rather than dropping quickly to keep continuous tension on the muscle and prevent bouncing out of the bottom.

Common mistakes

Bending the knees during the movement shifts tension away from the calves and reduces the effectiveness of the exercise.
Using partial range of motion by not lowering the heels fully limits muscle stretch and reduces overall calf development.
Bouncing out of the bottom position uses momentum instead of muscular force and increases injury risk to the Achilles tendon.

Sets and reps

For hypertrophy, perform 3 to 4 sets of 10 to 15 reps with moderate weight, while strength work typically uses 4 to 5 sets of 6 to 8 reps with heavier loads.

Track the Calf Raise (Machine) in Gym Track

Log every set in seconds, see your last session's weight and reps as you train, and get a new PR flagged automatically. Free on iPhone and Android.

Get the app

Frequently asked questions

Should I do calf raises with straight or bent knees?: The machine calf raise is performed with straight legs to emphasize the gastrocnemius, the larger outer calf muscle. Bent-knee variations like seated calf raises target the soleus more directly, so including both variations provides complete calf development.
How do I prevent my calves from cramping during calf raises?: Cramping often results from inadequate warm-up, dehydration, or jumping to heavy weight too quickly. Start with lighter sets to prepare the muscles, ensure proper hydration and electrolyte balance, and gradually increase resistance across your working sets.
Why are my calves not growing from calf raises?: Calves often require high training volume and frequency due to their endurance-oriented fiber composition and daily use. Try training calves two to three times per week with varied rep ranges, ensuring you use full range of motion and progressive overload over time.

More leg exercises

All leg exercises →