Video summary

Chinups vs. Pullups for Bigger Arms (THE VERDICT!)

Main summary

Key takeaways

Educational

Main ideas / lesson

  • The video compares pull-ups vs. chin-ups to determine which is better for bigger arms.
  • The verdict is not that one variation “wins entirely”—each emphasizes different muscles. The best approach is to use both, with specific technique cues.
  • Technique matters more than the label: doing chin-ups or pull-ups “wrong” can shift emphasis toward the other muscle.

Key concepts (muscle targets and why)

1) Chin-up (underhand grip) → biceps emphasis (if performed with curl mechanics)

  • Chin-ups use an underhand/supinated grip.
  • The likely outcome is increased biceps activation, because the biceps help as your arm moves toward supination.
  • Caveat: if you simply pull using the chin-up setup, you may also get strong lat activation, which can steal work from the biceps.

How to make chin-ups a better biceps builder

  • Aim to curl your body upward rather than just pulling straight up.
  • Use a form cue similar to a barbell curl:
    • Think: “curl yourself to the bar” instead of “pull directly up.”
  • Result: better biceps recruitment, turning chin-ups into a strong biceps-focused exercise.

2) Pull-up (overhand grip) → brachialis emphasis (for arm width)

  • The video highlights brachialis (rather than triceps) as a key contributor to arm width.
  • A “muscle marker” (visual indicator) is used to show where brachialis activation peaks.

How to make pull-ups a better brachialis builder

  • Use a narrower grip than a typical wide-grip pull-up:
    • Wider grips limit elbow flexion.
    • Narrower grips allow more elbow flexion, better targeting brachialis.
  • Don’t pull so close that you “close down” the elbow angle.
    • Keep a bit of distance from the bar to maintain the elbow angle that supports brachialis engagement.
    • If you reduce the distance too much, brachialis activation drops.

Practical takeaway: narrow grip + maintain elbow angle/distance for brachialis growth.

Method / instruction list (technique + programming)

Chin-up technique (biceps-focused)

  • Use an underhand grip.
  • Perform the rep by curling your body toward the bar (curl-like mechanics).
  • Avoid pulling straight up in a way that makes the lats dominate.
  • If done this way, chin-ups become a strong biceps builder.

Pull-up technique (brachialis-focused)

  • Use a narrow grip (not wide).
  • Keep some distance rather than pulling so close that the elbow angle closes and activation fades.
  • Target the motion to support elbow flexion and brachialis engagement.

How to use both in a training plan

  • Bro split:
    • Treat brachialis work (pull-up style) as part of back day.
    • Treat biceps work (chin-up style) as part of arm day / biceps day.
  • Traditional pull-workout split:
    • Either alternate days (chin-up one day, pull-up the next), or
    • combine in one workout:
      • Use one as the strength focus (e.g., weighted pull-up),
      • Use the other as a higher-rep accessory (e.g., chin-up, possibly with a band if reps are limited).
  • Total body scheme:
    • Include either pull-ups or chin-ups every training session, using the same idea of progressive overload for growth.

Principle throughout: progressive overload over time drives gains in the muscles you’re targeting.

Speakers / sources featured

  • Jeff Cavaliere (AthleanX / Athleanx.com) — main presenter
  • Jesse — appears as the person who answers which exercise to start with (“Chin-ups!”)

Original video