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Isolation

Prone Y Raise

Trains traps first, with real work landing on rear delts, side delts.

Muscle contribution per set

Traps1
Rear Delts.50
Side Delts.20

These are the weights Forge's volume audit actually computes with — deliberately conservative, so compounds don't masquerade as full coverage. A 0.5 means a set counts as half a set for that muscle: meaningful help, not a replacement for direct work.

Tempo

3down
1pause
2up
0squeeze

Prone Y for lower trap and rear delt; tempo with pause builds scapular stability and posture.

Thumbs up; lift arms into Y shape, squeeze shoulder blades.

Derived from tempo research on this movement class — Schoenfeld BJ, Ogborn DI, Krieger JW.

How Forge progresses it

Progresses by load in +0.5kg steps. Isolation work is where the honest-volume ledger pays off — compounds alone don't cover it.

Swap it for

Same movement pattern, same progression continuity — these are the alternatives the app offers mid-session when a rack is taken or equipment isn't there.

Train with intention. Open Forge — it prescribes the weight, watches the reps, and does this arithmetic for every set you log.