1RM (Epley)
Estimate max from a set.
When to use: Set of 1–10 reps with ~1–3 RIR left; plan % loads without a heavy true 1RM test.
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Epley
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Estimate, not medical advice.
1RM estimate
Epley: 1RM ≈ load × (1 + reps/30). Brzycki: 1RM ≈ load × 36/(37−reps). Use for ~1–10 reps with solid form.