1
Stand upright with feet hip-width apart, arms at sides or in a relaxed position, core engaged, and chest upright. Establish neutral spine alignment.
2
Shift weight onto one leg (stance leg) while keeping the torso stable. Prepare to drive the opposite knee upward. Keep hands in a natural running position.
3
Lower the knee that was raised by extending the leg downward and backward in a controlled manner, returning to the starting position. This is the eccentric phase as the quadriceps lengthens.
4
Drive the knee upward explosively toward chest level, contracting the quadriceps and hip flexors. Return to standing position on one leg and repeat, or alternate legs in a running motion.