Every movement with step-by-step instructions, the muscles it works, common mistakes and form tips — free, no account needed.
Rated beginner, the Machine Fly develops the chest through a push pattern loaded by selectorized machine. The muscular job here is to bring the upper arm across and in front of the body, and that translates directly into pressing strength and upper-body pushing power. It sits in the hypertrophy category, so the emphasis falls on controlled tension and quality repetitions. The 'Machine Fly' designation is not cosmetic — it tells you the specific setup and line of pull that separates this from its close relatives. Support comes from the front deltoids and biceps; the front deltoids in particular help contribute to the movement, which is why fatigue there often shows up before the chest is fully worked. Training this with selectorized machine makes load changes instant and keeps the movement path stable, though it may not fit every limb length despite adjustment. In a training week, this fits naturally into any session where chest is the priority. The pattern is accessible enough to learn in a single session, which makes it a sound entry point before progressing to heavier or more complex variations.
The Machine Fly is primarily a chest exercise, but it is never only the chest doing the work.
The general rule for the Machine Fly is simple: inhale as you lower the resistance toward you, exhale as you press it away. For heavier sets, take a breath in at the start position, brace as though bracing for a punch, and hold that pressure through the hardest part of the rep before exhaling. If your breathing falls apart, it is usually the first sign the set has gone past useful.
Shorten the range of motion to the portion you can control, then extend it as confidence builds. If selectorized machine feels unmanageable, rehearse the same pattern with bodyweight first. Film one set of the Machine Fly from the side; it's the fastest way to spot what to fix.
Add load in small increments while holding the same tempo and range you established. Track your Machine Fly numbers so you can see whether the chest is actually progressing.
Add a drop set on the last working set to extend the stimulus beyond your normal stopping point. Small, tracked increases on the Machine Fly beat occasional maximal efforts.
The Machine Fly suits most healthy trainees, but it is not appropriate for everyone.
This is general educational information, not medical advice. If you are managing an injury or medical condition, check with a qualified professional before adding this exercise to your programme.
It primarily trains the chest, with the front deltoids and biceps assisting. The pattern is classified as push, so the chest, shoulders and triceps working as a unit share the workload.
Yes. It is rated beginner-level, and the pattern can usually be learned in a single session with light resistance.
A practical starting point is 3 sets of 10-12, resting 60-90 sec between sets, roughly 2x per week. Adjust from there based on how you recover.
You need selectorized machine. This makes load changes instant and keeps the movement path stable, though it may not fit every limb length despite adjustment.
As a general rule, inhale as you lower the resistance toward you, exhale as you press it away. Avoid holding your breath for the entire set.
Shoulder impingement when the elbows flare excessively. The simplest correction is to keep the shoulder blades set down and back so the shoulder joint stays in a safe position.
Good substitutes that train the same chest pattern include Barbell Wide Bench Press, Svend Press Flat Bench, and Band Incline Palms Back Press. Pick whichever matches the equipment you have available.
Add a small amount of load once you can complete every set at the top of the rep range with clean technique. Keep tempo and range consistent so the comparison is honest.
Where the Machine Fly earns its place is repeatability — selectorized machine makes the setup easy to reproduce, which is what lets you actually progress the chest.
The chest is built around the pectoralis major, a large fan-shaped muscle that covers the front of the rib cage, and the smaller pectoralis minor beneath it. The pec major has two heads: a clavicular (upper) head that originates on the collarbone and a sternal (lower) head that originates along the breastbone. Both heads converge on the upper arm, which is why the chest is responsible for pushing your arms forward and across your body, as well as stabilising the shoulder during almost every upper-body lift.
Because the fibres run at different angles, training the chest from multiple angles is what produces a full, balanced look. Flat pressing — the barbell or dumbbell bench press — develops the bulk of the sternal head and is the foundation of raw pressing strength. Incline pressing shifts emphasis onto the often-underdeveloped upper chest, giving the muscle a fuller appearance near the collarbone. Decline pressing and dips bias the lower fibres. Flyes and cable crossovers add a stretch under load and a strong peak contraction that pressing alone cannot fully deliver.
For most lifters, the best results come from anchoring each session with one heavy compound press for strength and size, then adding one or two isolation movements to shape the muscle and reinforce the mind-muscle connection. Rep ranges of roughly 5 to 8 suit the heavy presses, while 10 to 15 works well for flyes and cable work. Two chest sessions per week, spaced a few days apart, tend to drive better growth than a single high-volume day.
Technique matters more on chest than almost anywhere else, because sloppy pressing turns a chest exercise into a shoulder-and-triceps exercise. Keep your shoulder blades pulled back and down against the bench to create a stable platform, maintain a slight arch, and lower the bar or dumbbells under control to the lower chest rather than the neck. Drive through the full range without bouncing, and avoid flaring the elbows to a full 90 degrees, which stresses the shoulder joint. Beginners should prioritise the push-up and machine presses to groove the pattern safely before loading heavy free weights.
Whether your goal is a bigger bench, a more aesthetic upper body, or simply functional pushing strength for daily life and sport, consistent progressive overload across these movements is the key. Below are some of the most popular and effective chest exercises in our library to build your routine around.