Pick accessories that target the muscles or sticking points your main compounds miss, then keep them simple and high-volume.
The quick answer
Accessories exist to fill gaps your big compounds leave, so choose them based on weak muscles or sticking points. If your bench stalls at lockout, add triceps work; if your squat rounds forward, add upper back and core. For a lagging muscle like biceps, side delts, or hamstrings, add direct isolation, since compounds rarely hit them fully. Keep 2 to 4 accessories per session in the 8 to 15 rep range.
How to think about it
Target what compounds miss
Squats, deadlifts, presses, and rows drive most growth but under-hit side delts, biceps, hamstrings, calves, and abs. Choose isolations for those, like lateral raises, curls, leg curls, and calf raises, to round out your physique.
Address your sticking points
If you fail bench off the chest, add pause work and upper chest; if you fail at lockout, add triceps and close-grip. Pick accessories that strengthen the exact spot where your main lift breaks down.
Keep them simple and repeatable
Accessories are for volume and detail, not ego. Choose 2 to 4 stable movements you can progressively overload for 8 to 15 reps, and stick with them long enough to actually get stronger before swapping.
Do this
List your lagging musclesName the body parts that are behind and assign one direct isolation to each.
Match to sticking pointsIdentify where your main lift fails and pick an accessory that trains that range.
Cap it at 2 to 4 per sessionMore accessories is not better, keep the list short and hit each hard.
Progress them like main liftsLog reps and add load over time instead of endlessly switching exercises.