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Arm accessory

Concentration Curl

Trains biceps first, with real work landing on forearms.

Muscle contribution per set

Biceps1
Forearms.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

Strict tempo + pause at stretch maximises biceps long-head stretch and peak contraction; eliminates cheating.

Elbow pinned to inner thigh; full supination at top.

Derived from tempo research on this movement class — Wilk M, Zając A, Tufano JJ.

How Forge progresses it

Progresses by load in +0.5kg steps — small muscles, small increments, long patience.

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.