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21's For Bigger Biceps With Chin-Ups — Key Takeaways

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21's For Bigger Biceps With Chin-Ups

Daniel Vadnal4mAug 19, 2026

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Do chin-up 21s as a bicep finisher: 7 full-range reps (dead hang to chin over bar), 7 top partials (chin over bar to 90°), 7 bottom partials (dead hang to 90°), no rest between segments.

Key takeaways

Chin-up 21s: 7 full ROM → 7 top partials (chin to 90°) → 7 bottom partials (90° to dead hang)

Chin-up 21s: 7 full ROM → 7 top partials (chin to 90°) → 7 bottom partials (90° to dead hang)

  • Sequencing hits biceps in both contracted and lengthened positions within a single set — rare for one exercise.
  • Close grip on straight bar reduces elbow/wrist discomfort and sharpens bicep focus.

Extended hang time in 21s builds forearm flexors and crushing grip as a free side effect

Extended hang time in 21s builds forearm flexors and crushing grip as a free side effect

  • Set duration is roughly 3× a normal chin-up set, tripling time under tension for grip musculature.

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In this video

  1. 1mHow to Perform Chin-Up 21s
  2. 1mThe Pump and Its Psychological Payoff
  3. 2mWhy Novelty and Enjoyment Matter for Consistency
  4. 3mMuscle Overload and Forearm Side Benefits
  5. 3mClose Grip Rationale and Origin of the Method

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