Plank Jacks
Primary
Cardio
Secondary
Core, Shoulders, Hip Abductors
Equipment
None
Difficulty
Intermediate
Type
Push
Plank Jacks
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Plank jacks combine the core stability demands of a plank with the cardiovascular challenge of jumping jacks. The lateral foot movement challenges hip abductors while maintaining plank position requires constant core engagement. This exercise delivers cardio conditioning without leaving the ground.
When to use it
Use for HIIT, core conditioning, or cardio finishers.
Who it's for
Intermediate athletes with solid plank form.
Keep your hips at the same height as your shoulders throughout—don't let them bounce up and down with each rep. Land softly on the balls of your feet and maintain a strong plank base.
Plank Jacks — targeted muscles
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How do you perform the Plank Jacks?
- 1
Start in high plank position, hands under shoulders.
- 2
Jump feet out wide like a jumping jack.
- 3
Immediately jump feet back together.
- 4
Keep hips level and core engaged.
- 5
Continue jumping in and out.
What are the best tips for the Plank Jacks?
Keep hips at same level as shoulders.
Engage core to prevent hips bouncing.
Land softly on balls of feet.
Maintain steady rhythm.
When to Use the Plank Jacks
Use plank jacks for HIIT circuits, core-focused cardio, or as an active plank variation. They pair well with mountain climbers and burpees in conditioning blocks. Choose these when you want core work with cardio in a single exercise.
Common Plank Jacks mistakes
Hips rising or dropping.
Losing hip position during the Plank Jacks shifts the loading pattern away from your Core and can compress your lower back. Stay planted and let your Core do the work.
Hands shifting out of position.
A poor grip during the Plank Jacks limits how much force you can produce and puts your wrists in a weak position. Set your grip before you start the rep, and keep your wrists stacked over your forearms.
Landing too heavily.
During any pressing movement like the Plank Jacks, this mistake reduces how effectively your Core can produce force. Focus on the muscle you're trying to work — if you can't feel your Core driving the movement, something is off.
Losing plank form with hips sagging or piking.
Losing hip position during the Plank Jacks shifts the loading pattern away from your Core and can compress your lower back. Stay planted and let your Core do the work.
Plank Jacks — who it's best for
Intermediate athletes with solid plank form.
How to Program the Plank Jacks
Lower reps with heavier weight builds raw strength. Your muscles and nervous system adapt to handle more load over time. This range is best for strength-focused goals.
This rep range keeps your muscles under tension long enough to trigger growth. Most people see the best muscle-building results in this zone. It balances strength and muscle size.
Higher reps with lighter weight builds muscular endurance and improves conditioning. This range is good for joint health and building work capacity.
General guideline: 3-4 sets of 20-30 reps. Rest 30-45 seconds.
What are good alternatives to the Plank Jacks?
Mountain Climbers (Cardio)
Jumping Jacks
Burpee
Other Variations
- Slow Plank Jacks
- Fast Plank Jacks
- Plank Jack to Push-Up
- Elevated Plank Jacks
Frequently Asked Questions About the Plank Jacks
The Plank Jacks primarily targets the Core, Shoulders, making it an effective exercise for cardio development. Secondary muscles worked during the Plank Jacks include Hip Abductors, Chest, providing additional training stimulus. Stabilizer muscles engaged include Triceps, Glutes.
The Plank Jacks is rated as intermediate difficulty, meaning it requires some training experience. Intermediate athletes with solid plank form. Focus on proper technique and consider starting with easier variations.
For the Plank Jacks, the recommended approach depends on your goals. 3-4 sets of 20-30 reps. Rest 30-45 seconds. For strength, use 15-25 reps. For muscle growth, perform 25-40 reps. For endurance, complete 40-60 reps.
Yes, the Plank Jacks can be done at home with no equipment. It requires minimal space and is a great option for home workouts targeting cardio.
Good alternatives to the Plank Jacks include: Mountain Climbers (Cardio), Jumping Jacks, Burpee. These exercises target similar muscle groups as the Plank Jacks and can be used as substitutes based on your equipment availability, gym setup, or training preferences.
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Safety Notes
- Master plank first.
- Keep hips stable.
- Modify with step-outs if needed.