Exercises Routines Build

Exercises Routines Build

Loading

Free workout discovery, building, and sharing. No account required.

Explore

Exercises
Routines
Training Notes
Build a routine

Gymdoer

About
Privacy
Terms

© 2026 Gymdoer. All rights reserved.

Half Jackknife · Gymdoer

Seek

Strength

Half Jackknife

Also known as: Half Jackknife Crunch, Partial Jackknife, Core Crunch

Muscles: Abs Hip Flexors
Equipment: Bodyweight Yoga Mat
Programs: Abs Core

Add to a routine