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Suck at pull ups? — No sweat🤔. The jackknife pull up is one of the best exercises you can do to build your lats, arms, and improve your pull ups. — ✓Set...
Do Your First Pull-up! : Pull-up Progression | Get Fit. Go Figure!
Jackknife Pull-up - YouTube
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4 tips to do Perfect Pull-ups + A Full Video Tutorial
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