Plank Jacks
Start in a forearm plank with your elbows under your shoulders, body in a straight line, and feet together. Keeping your hips level and your core braced, jump both feet out wide and then back together like a jumping jack with your legs. Move at a steady, controlled rhythm without letting your hips sag or pike up as your feet travel. Continue for the prescribed reps, breathing rhythmically and keeping the upper body solid.
ABS · CORE
How it is executed
- Start in a forearm plank with your elbows under your shoulders, body in a straight line, and feet together.
- Keeping your hips level and your core braced, jump both feet out wide and then back together like a jumping jack with your legs.
- Move at a steady, controlled rhythm without letting your hips sag or pike up as your feet travel.
- Continue for the prescribed reps, breathing rhythmically and keeping the upper body solid.
- Muscles worked
- Abs
- Primary muscle
- Upper abs
- Equipment
- Bodyweight
- Movement pattern
- Core
- Difficulty
- Intermediate
- What it is for
- StrengthHypertrophyCore strengthStability
Variations and substitutions
Put it to work in Kaizer
Create workout routines with AIFrom goals and equipment to an editable routine in minutes — one that keeps adapting itself, session by session.The best FitBudd alternatives in 2026The alternatives, including what each one does better.Pricing and plansBasic supports up to 3 clients from USD 5 a month.
Glossary and calculators
Training splitA training split is how the week's work is distributed across the available days.AutoregulationAutoregulation means adjusting a session's load or volume based on how the person responds that day, instead of following a number set weeks earlier.Price per sessionHow much to charge per session

