Gorilla Chin/Crunch — start position
Start
Gorilla Chin/Crunch — end position
End

Core / Intermediate / Compound (multi-joint)

Gorilla Chin/Crunch

A bar exercise for the abs, with the biceps, lats and forearms assisting.

At a glance

Primary
Abs
Secondary
Biceps, Lats, Forearms & grip
Equipment
Pull-up bar
Movement pattern
Vertical pull, Elbow flexion (curl), Trunk flexion
Level
Intermediate
Type
Core, Compound (multi-joint)

How to do it

  1. Hang from a chin-up bar using an underhand grip (palms facing you) that is slightly wider than shoulder width.
  2. Now bend your knees at a 90 degree angle so that the calves are parallel to the floor while the thighs remain perpendicular to it. This will be your starting position.
  3. As you exhale, pull yourself up while crunching your knees up at the same time until your knees are at chest level. You will stop going up as soon as your nose is at the same level as the bar. Tip: When you get to this point you should also be finishing the crunch at the same time.
  4. Slowly start to inhale as you return to the starting position.
  5. Repeat for the recommended amount of repetitions.

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Muscles worked

Neck (Front)Upper traps (Front)Front delts (Front)Side delts (Front)Chest (Front)Serratus anterior (Front)Biceps — secondary (Front)Forearms & grip — secondary (Front)Abs — primary (Front)Obliques (Front)Hip flexors (Front)Quads (Front)Adductors (Front)Shins (tibialis) (Front)Calves (Front)Outer shins (peroneals) (Front)Feet (arch & toes) (Front)Neck (Back)Upper traps (Back)Upper back (rhomboids, mid/lower traps) (Back)Rear delts (Back)Side delts (Back)Rotator cuff (Back)Lats — secondary (Back)Lower back (erectors) (Back)Triceps (Back)Forearms & grip — secondary (Back)Hip abductors (glute med) (Back)Glutes (Back)Hamstrings (Back)Adductors (Back)Calves (Back)
FrontBack
  • Primary: Abs
  • Secondary: Biceps, Lats, Forearms & grip

Best for

How specific this exercise is to each movement.

Photos and instructions: free-exercise-db (github.com/yuhonas/free-exercise-db), public domain.