STANDING KNEE RAISE

The standing knee raise is a bodyweight exercise that trains the hip flexors and core by lifting one knee toward the chest while standing and balancing on the opposite leg. It requires no equipment and doubles as a balance and coordination drill since the standing leg must stabilize the body throughout each rep. It is commonly used as a warm-up mobility drill, a low-impact core exercise, or a building block toward more dynamic movements like high knees or knee raise variations on a captain's chair.

Muscles Targeted

• Primary: Hip flexors (iliopsoas, rectus femoris)
• Secondary: Rectus abdominis, obliques
• Tertiary: Gluteus medius and other stabilizers of the standing leg

Starting Position

Stand tall with your feet hip-width apart, knees soft, and arms relaxed at your sides or hands resting lightly on your hips. Brace your core by drawing your belly button in toward your spine, and distribute your weight evenly before shifting onto one leg to begin the movement.

Execution Steps

1. Shift your weight onto one leg, keeping that knee slightly soft rather than locked
2. Brace your core before lifting the opposite leg
3. Drive your knee up toward your chest in a controlled motion, without leaning your torso backward
4. Hold briefly at the top, keeping your balance and your torso upright
5. Lower the leg back down under control to the starting position
6. Repeat for the desired number of reps, then switch to the opposite leg

Form Cues

• Stay upright: Keep your torso vertical rather than leaning back to gain extra height on the knee raise
• Move with control: Lift and lower the leg deliberately instead of swinging it with momentum
• Brace before each rep: Engage your core before lifting to keep the movement centered on the hip flexors and abs
• Keep the standing knee soft, not locked, to maintain balance and protect the joint
• Land softly between reps if performing the movement continuously

Common Mistakes

• Leaning the torso backward: Arching back to help lift the knee higher shifts stress onto the lower back and reduces ab engagement. Keep the torso stacked over the hips.
• Using momentum to swing the leg: A fast, uncontrolled kick reduces the muscular work of the exercise. Slow the tempo and control both directions.
• Raising the knee only to hip height: An insufficient range of motion under-trains the hip flexors. Aim to bring the knee toward chest height within your mobility.
• Locking the standing knee: A fully locked support leg reduces balance and increases joint stress. Keep a slight bend throughout.
• Holding the breath: Tensing up and holding air reduces core control. Breathe out as you raise the knee and in as you lower it.

Variations

• Medicine ball standing knee raise: Holding a medicine ball at chest level adds upper-body engagement and extra resistance
• Standing knee raise with resistance band: Looping a band around the ankle adds direct resistance to the hip flexors
• Standing knee raise to leg extension: Extending the leg forward after the raise adds a quadriceps and hip flexor challenge
• Standing knee raise on an unstable surface: Performing the movement on a balance pad increases the demand on stabilizing muscles
• Alternating high knees: A faster, continuous version that turns the movement into a dynamic cardio drill

Tips for Progression

• Add ankle weights or a resistance band once bodyweight reps feel easy
• Increase the hold time at the top of each rep to build hip flexor endurance
• Progress to an unstable surface to further challenge balance and core control
• Increase total volume by adding sets or performing the exercise as part of a circuit

Training Notes

Use the standing knee raise as a warm-up mobility drill or a light core exercise two to three times per week. Perform two to three sets of 10-15 reps per leg with minimal rest between sides, and rest 30-45 seconds between full sets. It fits well at the start of a session to activate the hip flexors and core, or as part of a core-focused circuit alongside planks and rotational work.