The first exercise receives a useful advantage: you have not yet accumulated the fatigue of the rest of the workout. Choosing it deliberately can make the session easier to organize, especially when you are learning a movement or working toward a particular goal.

Start with the warm-up and any light rehearsal the exercise needs. Being first does not mean beginning cold or immediately using the heaviest planned load. It means the exercise gets priority after preparation.

A movement that requires concentration, coordination or a demanding setup often belongs earlier than a familiar, simple accessory exercise. If you are learning a squat, tiring the legs with several other exercises first may make the lesson harder to interpret. If upper-body strength is the main priority, a pushing or pulling exercise may reasonably lead instead.

Consider what fatigue changes

Exercises share demands even when they use different names. Heavy carries can fatigue the grip before rows. A demanding leg movement can leave you breathing hard before another exercise that needs a steady stance. Look beyond the body-part label when arranging the order.

You do not need to follow a rigid hierarchy for every session. A rehabilitation plan, sport-specific program or individual limitation may require a different sequence. For general training, the practical question is which exercise deserves your freshest effort and why.

Equipment availability can force a change. If your intended station is occupied, choose a familiar alternative or move another suitable exercise forward. Be cautious about moving a technically demanding exercise to the very end after tiring yourself with everything else. It may be better to simplify the session than to preserve the list in a poor order.

Record a substantial change in sequence. The same weight may feel harder when an exercise comes fourth instead of first. Without that note, the log can suggest a loss of strength when the conditions were simply different.

Keep the beginning manageable enough to leave room for the rest of the session. An opening exercise does not need so many sets that every later movement becomes an afterthought. Allocate effort according to the plan, rather than using enthusiasm to exhaust yourself immediately.

Before entering the gym, finish the sentence “I am starting with this because…” If the answer is clear—learning a movement, prioritizing a goal or using a sensible available station—the order probably has a useful purpose. If there is no answer, that is an easy planning decision to improve.