Single Leg Calf Raise

Aim: This checks how well each calf can repeatedly lift bodyweight under control.

The calves contribute heavily to uphill propulsion, downhill control, ankle stiffness, and foot stability. In a long mountain race, weak or asymmetric calf endurance can show up as cramping, reduced climbing efficiency, poor descending control, or unstable foot placement.

How to perform it

1. 1Stand on one leg
2. 2Raise your heel as high as you can whilst maintaining balance
3. 3Repeat until you can't do any more
4. 4Repeat for the other leg and compare results

What to record

Maximum controlled reps on each leg, keeping height consistent. A large left/right difference is more useful than the absolute number.