The basic rule

Compound exercises before isolation exercises. Always. This is the most consistently supported principle in exercise ordering, and it is not complicated to apply.

Compound exercises are movements that involve multiple joints and large amounts of muscle mass simultaneously: squats, deadlifts, bench press, rows, overhead press. Isolation exercises target a single muscle group through a single joint: curls, lateral raises, leg extensions, cable flys.

Doing isolation work first fatigues the target muscle, which then limits your performance on the compound movements that depend on that muscle. Doing a set of bicep curls before rows means your biceps are pre-fatigued and will fail before your mid-back does. The limiting factor in your row becomes your biceps, not the primary muscle you are trying to train.

What the research says

A 2010 study published in the Journal of Strength and Conditioning Research found that exercise order significantly affected performance, with exercises performed first in a session showing consistently better volume and load outcomes than the same exercises performed later.

This effect was observed across experience levels. Both beginners and trained athletes showed performance decrements when primary exercises were moved later in the session.

Source: Simao R et al. Influence of exercise order on the number of repetitions performed and perceived exertion during resistance exercise. Journal of Strength and Conditioning Research, 2010.

The practical implication: Whatever muscle group you want to develop most should be trained first in a session, when you are freshest. If building a bigger back is the priority, rows and pull-ups come before any bicep work. If the priority is shoulder width, lateral raises come before tricep pushdowns.

Ordering within compound movements

When a session includes multiple compound exercises, order them by how much total muscle mass and load they involve. Squats and deadlifts come before leg press. Bench press comes before machine chest press. Barbell rows come before dumbbell rows.

The exercises with the highest neural and physical demand deserve to be performed when your capacity to express that demand is highest, which is at the start of a session.

What about supersets?

Supersets involve performing two exercises back-to-back with no rest between them. When structured to target opposing muscle groups (chest and back, biceps and triceps, quads and hamstrings), they can be effective for maintaining training density while allowing each muscle group to rest while the other works.

Supersetting non-opposing muscle groups, for example chest and biceps, is less efficient because both muscles are involved in similar movement patterns and the first exercise genuinely fatigues relevant structures for the second.

Multiple muscle groups in one session

When training multiple muscle groups in a single session, the same principle applies. Train the larger, more demanding muscle groups first. Back before biceps. Chest before triceps. Quads before calves. The larger muscles require more neural and cardiovascular resources, and they drive more of the compound movements that should come first.

Abs and forearms, if trained at all in the same session, should come last. They are involved as stabilisers in almost every compound movement. Training them to fatigue early compromises your performance on the exercises where they need to function.

A common mistake to avoid

Doing the exercises you enjoy first rather than the ones that should come first. Most people have a favourite exercise or a movement that feels satisfying. It is natural to want to start with that. But enjoyment and effectiveness are not the same thing. If your programme says squats first, do squats first, even if you would rather do leg press.

The session structure exists to maximise what you get from the time you are putting in. Disrupting it consistently undermines the logic of the programme without you necessarily being aware of the accumulated cost.