Modified Mountain Climber and Extension

Primary muscles
Abs
Secondary muscles
Quads, Shoulders
Equipment
Body weight
Movement pattern
None

Steps

  1. 1 Start in a plank position with your hands directly under your shoulders and your body in a straight line from head to heels.
  2. 2 Drive one knee towards your chest, keeping your core engaged and hips stable.
  3. 3 Extend that leg back to the starting plank position.
  4. 4 Repeat the movement by driving the opposite knee towards your chest, alternating sides with each repetition.

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