Butterfly
A beginner isolation movement that trains the chest with a machine.
Force Type
Pull
isolation
Difficulty
Beginner
isolation
Variations
0
equipment swaps
Muscles
1
primary + secondary
The verdict
Butterfly has 5-step instructions, more thoroughly documented than most of the 84 chest exercises PlainExercise catalogues.
Ranked against the 84 chest exercises PlainExercise currently catalogues, not the full exercise-science literature.
Catalog lens
Two ways this record sits in the source corpus
These are placement measures for the documented record, not a score for exercise quality, safety, or suitability.
Instruction steps
#188 of 868
5 numbered source steps; the longest instruction list ranks #1.
Instruction text
#516 of 868
A separate character-length placement prevents step count from standing in for explanatory detail.
Butterfly is a beginner isolation movement that trains the Chest. It requires a machine. There are 0 known variations and 8 peer exercises that target the same primary muscle.
- 1 of 9 exercises targeting the Chest
- Level: beginner
PlainExercise cross-links 0 variations and 8 peer exercises sharing the same primary muscle.
What the Butterfly Data Reveals · DOC · PULL/ISOLATION
Butterfly opens on mechanic class: ISOLATION pull work for chest with 0 catalogued assistants, joint involvement separates this page from isolation peers.
Among 873 exercises, 5 steps sit in the upper third (≥ 5). Longer step lists usually mean finer setup cues, not a harder movement by themselves.
Butterfly is classified as a beginner-level isolation movement with a pull force profile, primarily training the Chest. The canonical form requires a machine in the strength category. Within the chest cohort, 9 catalogued movements share the primary target; no alternate-equipment variations are catalogued yet.
Context matters: taxonomy (level, mechanic, force, musculature, equipment) does not account for individual biomechanics, joint history, or recovery. Common-mistake framing below is derived from classification fields, not case-specific coaching. Not medical or personal-training advice. Consult a physician or certified trainer before starting, especially with injuries, cardiovascular conditions, recent surgery, or pregnancy.
Exercise profile
| Attribute | Value |
|---|---|
| Difficulty | beginner |
| Mechanic | isolation |
| Force | pull |
| Equipment | machine |
| Category | strength |
| Primary muscle | Chest |
| Secondary muscles | 0 |
| Variations available | 0 |
Source: Free Exercise DB (CC0); profile derived per exercise record.
Butterfly catalog footprint
Among 84 exercises whose primary muscle is chest, Butterfly ranks #34 by catalogued variation count (0 listed heres). The upstream file attaches 2 images to this slug. See the step-count ranking for chest for peer documentation depth.
Muscles worked
According to the Free Exercise DB classification, Butterfly trains the chest as the prime mover and no catalogued secondary muscles. 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. Butterfly 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
- Sit on the machine with your back flat on the pad.
- Take hold of the handles. Tip: Your upper arms should be positioned parallel to the floor; adjust the machine accordingly. This will be your starting position.
- Push the handles together slowly as you squeeze your chest in the middle. Breathe out during this part of the motion and hold the contraction for a second.
- Return back to the starting position slowly as you inhale until your chest muscles are fully stretched.
- Repeat for the recommended amount of repetitions.
Butterfly Documentation Depth
Butterfly carries 5-step instructions (532 characters of Free Exercise DB text) - enough upstream detail to compare documentation depth inside the chest cohort, not just the taxonomy badges above. Across 84 catalogued chest movements, the average instruction record is 667 characters and 4.6 steps; 59 of those (70.2%) clear the same ≥500-character rich bar used here. This page ranks #49 of 84 by instruction-character length (79.8% of the cohort average).
Among the 67 exercises that also use a machine, average instruction length is 786 characters; 50 of those peers are longer than this record. Equipment-matched peers are the honest comparison when you are choosing a substitute implement for the same pattern.
Other well-documented chest movements (same ≥500-character bar):
- One-Arm Flat Bench Dumbbell Flye (6 steps, 1,255 chars)
- Bent-Arm Dumbbell Pullover (6 steps, 1,204 chars)
- Straight-Arm Dumbbell Pullover (6 steps, 1,172 chars)
- Hammer Grip Incline DB Bench Press (7 steps, 1,163 chars)
- Incline Dumbbell Bench With Palms Facing In (7 steps, 1,163 chars)
Common mistakes
- Rushing through reps before the pattern is grooved - at this stage, a slow, controlled tempo (2-3s down, 1-2s up) on Butterfly teaches the nervous system the movement far faster than speed does.
- Cutting the range of motion short - moving the chest through its full safe range on Butterfly is what most reliably separates effective reps from wasted ones.
- Using momentum instead of muscle, isolation movements like Butterfly reward strict form. If you're swinging the weight, it's too heavy.
- 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 Butterfly - brace and inhale during the lowering phase, exhale on the exertion, especially important with a machine where control matters most.
Who this is for
- People new to resistance training who want to build a foundation in the movement pattern
- People who want to train the Chest
- People who have access to a machine
Who this is NOT for
- People hunting equipment swaps, PlainExercise lists 0 catalogued variations for Butterfly; browse 8 peer chest exercises for alternate patterns instead.
- 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 Butterfly 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 intermediate-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 · MACHINE · PULL/ISOLATION · FLOOR
- On PULL/ISOLATION chest work, warm up 5–10 minutes before loading Butterfly; keep first sets light until the path feels automatic.
- Sharp or joint pain is a stop signal. Muscle soreness during sets is normal; pain is not.
- Beginners on MACHINE gear: cut volume before cutting form, drop a set rather than rush reps.
- General information only. Consult a physician or certified trainer before starting any new exercise program.
Nationwide exercises with similar documentation depth
Two Free Exercise DB peer sets for Butterfly, drawn across all muscles (not the chest-only related list below). Each metric produces a different neighborhood.
Similar instruction step count
Nearest catalog records by numbered steps (5 here).
Similar instruction text length
Nearest catalog records by upstream instruction characters (532 here).
Related exercises
Other exercises that target the Chest.
See all Chest exercises.
Using the butterfly
A beginner isolation movement for the chest - here's how to put it to work.
- Train the chest 2–3 times a week with 48+ hours between hard sets; pair this with other chest movements for balanced development. All chest exercises
- Match the load and rep range to your goal, strength, size, or endurance each call for a different scheme. Strength vs hypertrophy
- As an isolation movement, use it to target the chest directly after your compound lifts. 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.