Skip to content
Crucible Fit
  • The Crucible
  • The Week
  • Programs
  • Train Your Way
  • Pricing
Get Crucible
  • The Crucible
  • The Week
  • Programs
  • Train Your Way
  • Apple Watch
  • Pricing
  • FAQ
  • Training Guides
Get Crucible
Crucible Fit

A daily functional fitness test for iPhone, Apple Watch and Android. Stations, reps and the Crux, sized to your readiness and your kit.

Download on the App StoreGet it on Google Play

Crucible Fit

  • The Crucible
  • The Week
  • Programs
  • Train Your Way
  • Apple Watch
  • Pricing

Explore

  • Training Guides
  • Exercise Library
  • FAQ
  • Press
  • Support

Legal

  • Terms and Conditions
  • Privacy Policy
  • Consumer Health Data Notice

CRUCIBLE FIT™ and Crux by Crucible Fit are trademarks of Crucible Fit, LLC.

© 2026 Crucible Fit, LLC. All rights reserved. Apple, the Apple logo, iPhone and Apple Watch are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc. Google Play and the Google Play logo are trademarks of Google LLC.

  1. Home
  2. /
  3. Exercises
  4. /
  5. Shoulders
  6. /
  7. Plank Jump In

Exercise guide

Plank Jump In

  • Intermediate
  • Compound
  • Reps + time
  • Lower legs
  • Shoulders
  • Upper legs
  • Waist

The Plank Jump In is a dynamic core exercise that builds explosive power and cardiovascular endurance while challenging the stability of the shoulders and trunk. It effectively targets the lower abdominals and hip flexors through rapid hip flexion and stabilization.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Plank Jump In demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Abs
  • Deltoids
  • Obliques
  • Quadriceps

Secondary

  • Erector spinae
  • Glutes
  • Serratus anterior

Equipment

  • Body weight

Setup

  1. Begin in a high plank position with your hands placed directly under your shoulders.
  2. Engage your core and glutes to create a straight line from your head to your heels.
  3. Position your feet hip-width apart with your weight on the balls of your feet.

How to do it

  1. Exhale and jump both feet forward toward your chest, landing softly on the balls of your feet just behind your hands.
  2. Maintain a flat back and avoid letting your hips rise too high during the jump.
  3. Inhale as you jump both feet back to the starting high plank position with control.
  4. Perform the movement at a brisk, rhythmic tempo while keeping your shoulders stacked over your wrists.

Form checklist

  • Keep your hands flat and fingers spread for a stable base.
  • Do not let your lower back arch or your hips sag when jumping back.
  • Ensure your knees track toward your elbows, not splaying out to the sides.
  • Keep your gaze slightly in front of your hands to maintain a neutral cervical spine.

Pro tips

  • Focus on 'pulling' your knees in using your lower abs rather than just kicking your legs.
  • Try to land as silently as possible; quiet landings indicate superior core control and eccentric deceleration.
  • Keep your shoulder blades slightly protracted (pushed away from the floor) to maximize serratus anterior and core engagement.

Make it harder

  • Perform the jump in and immediately follow with a vertical tuck jump for a high-intensity plyometric challenge.
  • Wear a weighted vest to increase the load on the core and shoulders during the stabilization phase.

Frequently asked

What muscles does the plank jump in work?
The plank jump in primarily targets the abs, deltoids, obliques, and quadriceps, and also works the erector spinae, glutes, and serratus anterior as secondary muscles.
What equipment do you need for the plank jump in?
The plank jump in requires no equipment — just your body weight.
Is the plank jump in good for beginners?
The plank jump in is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.

Related exercises

  • Dumbbell Front Hand To Hand Single Leg BalanceIntermediate · abs, deltoids, glutes, obliques, and quadriceps
  • Front Kick TwistIntermediate · abs, deltoids, glutes, hamstrings, obliques, and quadriceps
  • Lying Leg Tuck Hip Twist StretchBeginner · abs, deltoids, obliques, pectorals, and quadriceps
  • Medicine Ball Step Behind Rotational ThrowIntermediate · abs, deltoids, glutes, obliques, pectorals, and quadriceps

Train it with Crucible Fit.

Every movement in this library is in the app with video and instructions, ready for your own sessions on the days between Crucibles. Your first Crucible is on us.

Download on the App StoreGet it on Google Play

See how a Crucible works