One leg at a time doubles the effective load per calf — critical for the 2:1 lever ratio where external loads must be extreme. Alternating legs allows brief recovery between reps without rest between sets.
Doubled effective load — one leg carries the full barbell weight, effectively doubling the calf tension per side.
2:1 lever compensation — the most efficient lever in the body needs extreme loading; unilateral work achieves this without doubling the barbell weight.
Time-efficient — alternating legs provides built-in rest for each calf without formal rest periods.
Placed fourth as the single calf exercise on Legs B before transitioning to core.