strength · beginner

Calf Raises (Straight Knee)

A standing calf raise performed with the knee locked in extension, targeting the gastrocnemius specifically. Essential for runners given the calf complex absorbs 6-8x body weight with every stride.

  1. 01Stand on the edge of a step with your heels hanging off the back.
  2. 02Keep your knees straight (not locked — a micro-bend is fine).
  3. 03Rise up onto your toes as high as possible, squeezing the calves at the top.
  4. 04Hold the top position for 1-2 seconds.
  5. 05Lower slowly below the level of the step to get a full stretch at the bottom.
  6. 06Pause briefly at the bottom and repeat without bouncing.
Why it matters

The gastrocnemius is the primary force producer during push-off in running. It works eccentrically during early stance and concentrically during toe-off, generating the propulsive force that drives you forward. Weakness here is directly linked to Achilles tendinopathy, calf strains, and plantarfasciitis. Research suggests runners need the ability to perform 25+ single-leg calf raises to have adequate calf endurance for distance running.