Gorilla Chin/Crunch
A intermediate compound movement that trains the abdominals with just bodyweight.
Force Type
Pull
compound
Difficulty
Intermediate
compound
Variations
0
equipment swaps
Muscles
3
primary + secondary
The verdict
Gorilla Chin/Crunch has 5-step instructions, more thoroughly documented than most of the 93 abdominals exercises PlainExercise catalogues.
Ranked against the 93 abdominals exercises PlainExercise currently catalogues, not the full exercise-science literature.
Gorilla Chin/Crunch is a intermediate compound movement that trains the Abdominals along with biceps and lats. It requires just bodyweight. There are 0 known variations and 8 peer exercises that target the same primary muscle.
- 1 of 9 exercises targeting the Abdominals
- Level: intermediate
PlainExercise cross-links 0 variations and 8 peer exercises sharing the same primary muscle.
What the Gorilla Chin/Crunch Data Reveals
Gorilla Chin/Crunch is classified in the PlainExercise database as a intermediate-level compound movement with a pull force profile, primarily training the Abdominals with secondary engagement of the biceps, lats. The canonical form requires just bodyweight, and the movement falls within the strength category. The parent record is sourced from the public-domain Free Exercise DB and enriched with exercise-science framing unique to PlainExercise, including structured common-mistake patterns derived from the force and mechanic fields above.
Within the same primary-muscle cohort, the Abdominals is trained by 9 catalogued movements in total, meaning any practitioner planning a session has at least 8 alternatives that load the same tissue through different joint angles or equipment profiles. No alternate-equipment variations have been catalogued for Gorilla Chin/Crunch yet; the canonical form is the documented path. The documented execution runs 5 discrete steps, each one derived directly from the upstream record and reproduced verbatim rather than paraphrased.
Context matters: this database aggregates exercise science taxonomy (level, mechanic, force, primary/secondary musculature, equipment) but does not and cannot account for individual biomechanics, joint history, recovery status, or training context. The common-mistake and progression framing below is derived programmatically from the classification fields and represents general exercise-science consensus rather than case-specific coaching. This is not medical or personal-training advice. Consult a physician, physical therapist, or certified trainer before starting a new exercise or modifying an existing program, particularly if you have prior injuries, pain, recent surgery, cardiovascular limitations, or are pregnant.
Muscles worked
Exercise profile
| Attribute | Value |
|---|---|
| Difficulty | intermediate |
| Mechanic | compound |
| Force | pull |
| Equipment | body only |
| Category | strength |
| Primary muscle | Abdominals |
| Secondary muscles | 2 |
| Variations available | 0 |
Source: Free Exercise DB (CC0); profile derived per exercise record.
Muscles worked
According to the Free Exercise DB classification, Gorilla Chin/Crunch trains the abdominals as the prime mover, with 2 muscles assisting. The source classifies muscles as primary or secondary, it does not measure activation, so we show involvement, not percentages.
Source: Free Exercise DB primary/secondary muscle classification. Involvement, not measured activation, actual recruitment varies by load and form.
Intensity context
For reference, here is where common activities sit on the MET intensity scale. Gorilla Chin/Crunch does not have a measured MET in the source data, its intensity depends on the load and effort you use. Estimate calories for any activity with the calorie calculator.
MET values from the Compendium of Physical Activities (Ainsworth et al., 2011). A general reference scale, not a rating of this specific movement.
How to do it
- Hang from a chin-up bar using an underhand grip (palms facing you) that is slightly wider than shoulder width.
- 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.
- 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.
- Slowly start to inhale as you return to the starting position.
- Repeat for the recommended amount of repetitions.
Common mistakes
- Rushing through reps, controlled tempo (2-3s down, 1-2s up) is what drives muscle tension on Gorilla Chin/Crunch, not raw speed.
- Cutting the range of motion short - moving the abdominals through its full safe range on Gorilla Chin/Crunch is what most reliably separates effective reps from wasted ones.
- Treating a compound lift like an isolation movement - Gorilla Chin/Crunch recruits multiple joints; bracing the core and engaging stabilizers matters as much as the prime movers.
- Shrugging the shoulders up toward the ears on pull movements, keep shoulder blades down and back to load the correct muscles.
- Breathing out of sync with the lift on Gorilla Chin/Crunch - brace and inhale during the lowering phase, exhale on the exertion, especially important with just bodyweight where control matters most.
Who this is for
- People with 6+ months of consistent training who can perform basic compound lifts with good form
- People who want to train the Abdominals and secondarily biceps, lats
- People training at home without equipment
Who this is NOT for
- Anyone with acute pain in the joints or muscles involved, pain is a stop signal, not a soreness signal
- People with unresolved injuries in the loaded joints, seek clearance from a physical therapist first
- Anyone with a recent surgery, cardiovascular limitation, or pregnancy complication without physician clearance
Progression path
Once Gorilla Chin/Crunch feels comfortable with your current load, progress by (a) adding reps until you can complete 12+ per set, (b) increasing resistance by 2.5-5%, (c) moving to harder variations such as single-limb or longer lever versions, and eventually (d) stepping up to expert-level movements that train the same muscle.
See the Progression guide for a full framework on when to advance, and the Compound vs Isolation guide to decide when to prioritize this movement in your program.
Safety notes
- Sharp or joint pain is a stop signal. Muscle soreness during sets is normal; pain is not.
- Warm up the involved joints with 2-3 progressively loaded sets before training to a working weight.
- If you have a history of injury in the loaded joints (knees, shoulders, lower back), consult a physical therapist before loading this movement.
- General information only. Consult a physician or certified trainer before starting any new exercise program.
Related exercises
Other exercises that target the Abdominals.
See all Abdominals exercises.
Using the gorilla chin/crunch
A intermediate compound movement for the abdominals - here's how to put it to work.
- Train the abdominals 2–3 times a week with 48+ hours between hard sets; pair this with other abdominals movements for balanced development. All abdominals exercises
- Match the load and rep range to your goal, strength, size, or endurance each call for a different scheme. Strength vs hypertrophy
- As a compound lift, this trains several muscles at once, anchor your session around it before isolation work. Compound vs isolation
Form before load. If a movement causes sharp or joint pain, stop and substitute a safer alternative, this is general information, not medical or training advice.