Hamstrings

6–10 reps for hinges · 10–15 reps for curls

The hamstrings are powerful muscles capable of handling substantial resistance, but their best hypertrophy work also places them under high tension at long muscle lengths, particularly during hip-hinge and leg-curl patterns. 8–15 reps keeps loading heavy enough to exploit that force capacity while giving the hamstrings enough repeated work to become the clear local limiter.

Going much heavier makes the tradeoff less attractive. On hinges, grip, spinal erectors, bracing and technique increasingly compete with the hamstrings. On curls, very heavy loading makes shortened range and momentum easier to introduce. Going much higher remains effective, especially on curls, but adds discomfort and fatigue without solving a problem the hamstrings have. The middle ground delivers high tension, clean execution and strong progression runway.

5 hard sets per session · 1 RIR

Hamstring training carries a meaningful local and systemic cost. Hip hinges load the entire posterior chain, while hard leg curls can create severe local fatigue and rapidly degrade subsequent performance. Stopping at 1 RIR captures nearly all of the productive end of each set without repeatedly pushing a heavily lengthened muscle or demanding hinge pattern to absolute failure. Five hard sets is therefore a better trade than relying on fewer maximal-effort sets.

At 1 RIR, each productive set contributes roughly 4 GPRs. Five sets × ~4 GPRs = ~20 GPRs.

The hamstrings share one GPR budget across their heads, but exercise selection determines how that budget is distributed. This matters because the hamstrings are biarticular: hip-extension work and knee-flexion work do not stimulate every region identically. A complete hamstring stimulus should therefore allocate the shared ~20 GPRs across both hinge and curl patterns, rather than accumulating 20 GPRs from each as though they were separate muscles.

Every 3 days

Hamstring training creates unusually deep local fatigue because the muscles are frequently loaded hard while lengthened, while hinge-based work adds substantial posterior-chain and systemic demand. About 72 hours gives force production, local tissue fatigue and the supporting musculature enough time to recover before another full-quality hamstring stimulus.

All hamstring heads share the same recovery clock. A leg curl and an RDL emphasize the musculature differently, but neither creates an entirely fresh recovery system for the fibers emphasized by the other. Hard sprinting also matters because it exposes the hamstrings to substantial high-force lengthening demands even though it is not resistance training.

Think hamstrings every three days, then distribute each exposure intelligently across hip extension and knee flexion, rather than treating different hamstring regions or functions as independent schedules.