Heel Flick

Heel flicks, also called butt kicks, are a dynamic bodyweight running drill performed while jogging forward, quickly bending each knee so the heel flicks up toward the glute on every step. They are used to warm up the hamstrings and reinforce efficient running mechanics before sprint, agility, or lower-body training sessions rather than as a strength-building exercise on their own. Because the movement is driven by rapid knee flexion, it isolates the hamstrings and calves while keeping the thigh relatively still.

Muscles Targeted

• Primary: Hamstrings
• Secondary: Glutes, calves
• Tertiary: Hip flexors, as each leg cycles forward again

Starting Position

Stand tall with feet hip-width apart and a slight forward lean from the ankles, as if beginning a light jog. Keep your arms bent at roughly 90 degrees and ready to move in a relaxed running rhythm.

Execution Steps

1. Begin jogging forward at an easy, controlled pace
2. As each foot lifts off the ground, quickly flick your heel up toward your glute by bending sharply at the knee
3. Keep your thigh relatively still and pointed toward the ground - the motion comes from the knee, not the hip
4. Bring the foot back down quickly under your hips and drive immediately into the next step
5. Repeat on the opposite leg, maintaining a quick, light cadence as you alternate
6. Continue for a set distance, roughly 10-20 yards, or a set duration of 20-30 seconds

Form Cues

• Keep your torso tall and relaxed rather than leaning forward
• Focus on the speed of the heel flick rather than how high the knee travels
• Keep ground contacts light and quick, staying on the balls of your feet
• Let your arms swing naturally in rhythm with your legs
• Keep your core lightly braced so your hips don't sway side to side

Common Mistakes

• Turning it into a knee-drive drill: Lifting the thigh high instead of flicking the heel shifts emphasis onto the hip flexors instead of the hamstrings. Keep the thigh low and let the lower leg do the work.
• Moving too slowly: Heel flicks are meant to be quick and rhythmic; performing them slowly removes the dynamic warm-up benefit. Pick up the cadence once the pattern feels comfortable.
• Overstriding: Reaching the foot too far forward on each step disrupts the drill's rhythm. Keep steps short and quick, landing directly under the hips.
• Leaning back: An exaggerated backward lean while trying to kick the heel higher strains the lower back. Stay tall and let the flick happen naturally under the body.

Variations

• Stationary heel flicks: Performed in place rather than moving forward, useful in tight spaces
• Butt kick sprints: A faster, more explosive version used later in a warm-up or as conditioning
• A-skip: A related running drill that adds a knee-drive component alongside the heel flick
• Resisted heel flicks: Performed with a light band around the ankles for added hamstring activation

Tips for Progression

• Start with short distances, around 10 yards, at a slow cadence to groove the pattern
• Gradually increase cadence and distance as coordination improves
• Progress toward butt kick sprints once the basic pattern feels quick and controlled
• Add the drill into a running-specific warm-up ahead of sprint or agility sessions

Training Notes

Use heel flicks as part of a dynamic warm-up before running, sprinting, or lower-body training sessions, typically for 2-3 sets of 15-20 yards or 20-30 seconds. They take only a few minutes and are best performed after a general warm-up of light jogging but before any high-speed running, helping prime the hamstrings and reinforce efficient running mechanics.