Exercise guide
Knee Raise Side Jab
- Intermediate
- Compound
- Rep-based
- Lower arms
- Shoulders
- Upper arms
- Waist
This dynamic compound movement combines a high knee drive with a cross-body punch to engage the core and obliques while building upper body coordination and cardiovascular endurance.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Stand with your feet hip-width apart and a slight bend in your knees.
- Bring both hands up to a 'guard' position near your chin with elbows tucked close to your ribs.
- Engage your core and maintain an upright posture with your shoulders pulled back.
How to do it
- Simultaneously drive your right knee up toward your chest while extending your left arm in a controlled jab across your body to the right.
- Exhale sharply at the peak of the movement, focusing on the contraction in your obliques and abs.
- Return your foot to the floor and snap your hand back to the guard position with control.
- Repeat the movement on the opposite side, alternating sides for each repetition at a steady, rhythmic tempo.
Form checklist
- Keep your standing leg slightly bent to maintain balance and absorb impact.
- Avoid leaning backward as you lift your knee; keep your torso as vertical as possible.
- Ensure your punching arm does not fully lock out at the elbow to protect the joint.
- Pivot slightly on the ball of your standing foot to allow for a natural hip rotation during the jab.
Pro tips
- Visualize 'crunching' your ribs toward your opposite hip during the knee raise to maximize oblique activation.
- Focus on the 'snap' of the punch—retracting the arm quickly is just as important for muscle engagement as the extension.
Make it harder
- Increase the speed of the transitions to turn the exercise into a high-intensity cardio interval.
- Hold light dumbbells or wear weighted wrist bands to increase the resistance on the deltoids and pectorals.
Frequently asked
- What muscles does the knee raise side jab work?
- The knee raise side jab primarily targets the abs, deltoids, and obliques, and also works the hip flexors, quadriceps, and serratus anterior as secondary muscles.
- What equipment do you need for the knee raise side jab?
- The knee raise side jab requires no equipment — just your body weight.
- Is the knee raise side jab good for beginners?
- The knee raise side jab is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.