Round Hamstrings Training: XPL Hypertrophy Architecture

# Round Hamstrings: The Architecture for This Frame

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## Layer 1: The Frame

The Round hamstrings respond to trap bar RDL loading. The posterior chain at this frame warrants the intensity.

The Round at 230-275 lbs requires archetype-specific hamstrings mechanics. The Endomorph structure creates specific lever lengths and recruitment patterns that determine which movements produce mechanical tension and which produce compensation.

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## Layer 2: The Anatomy

The endomorphic posterior chain at 230 to 275 pounds responds to trap bar Romanian deadlift loading at 70 to 80 percent. The trap bar reduces lumbar compression. Seated leg curls drive the lengthened-position stimulus. Nordic curls with assistance are available as an eccentric tool.

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## Layer 3: The Protocol

Primary: Trap bar Romanian deadlift 3 to 4 sets of 8 reps. Secondary: Seated leg curl 3 sets of 10 to 12 reps. Tertiary: Assisted Nordic curl 2 sets of 6 reps. Frequency: twice weekly.

Volume landmarks: maintenance at 8 to 10 weekly sets. Growth threshold at 12 sets. Specialization at 16 to 20 sets. Add load only when previous weight executes with full range and zero form breakdown.

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## Layer 4: The Psychology

The Round hamstrings respond to trap bar RDL loading at the weight the training history supports. The trap bar is the mechanically appropriate primary for this frame.

Identity Mirror: What story are you telling yourself about why this muscle group has not responded?

Action Trigger: When exactly is your next hamstrings session, and what load will you use on the primary movement?

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## Layer 5: The Exit

The Round hamstrings trained through trap bar RDLs and seated leg curls for 12 weeks produce the posterior thigh development that completes the lower body.

The Round frame trained with archetype-specific hamstrings mechanics for 12 consecutive weeks produces structural development that generic programming cannot deliver.

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*Explore the full XPL training library:*

– [Training & Exercise Protocols](/blog/training-and-exercise)
– [Nutrition Architecture](/blog/nutrition)
– [Recovery Engineering](/blog/recovery)

*Know your XPL Archetype. [Take the Archetype Identification](https://xperformancelab.com/quiz).*

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*Inertia Over Inspiration. Engineered by XPL.*