How To Use Leg Extension Machine Correct Form ❌✅

1 Mar 2026 · 1 min

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In this short instructional video, fitness coach Eric Roberts warns viewers about a common mistake on the leg extension machine—positioning the knees too far from the seat pad, which creates unnecessary knee pressure and pain. He demonstrates the correct setup: sliding the seat back so the knee bend rests on the seat pad and aligns with the machine’s pivot point. This alignment maximizes quad muscle activation while minimizing knee discomfort. Roberts concludes with a friendly reminder to follow for more fitness tips.

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Stop doing this on your leg extensions. It's ruining your gains. Most people have their knees too far away from the seat pad, which puts unnecessary pressure on your knees, causing pain. So instead, move the seat back and let the bend of your knees rest on the seat pad. So now your knee is in line with where the machine rotates. And this will maximize your quads and minimize your knee pain. I hope this helped, and follow for more tips.