Best and Worst Exercises

Are These 7 Exercises Worthless?

Stop wasting minutes of your workout doing moves that are ineffective and potentially dangerous

Leg Extensions

You might associate the leg-extension machine with working out your quads, but it can also be hard on the knees and back. The pressing movement required is hard on the kneecap and can wear down cartilage. The machine can also put unnecessary pressure on your spine if you lean back as you push your legs.

Do this instead
To really work your quads, try a Bulgarian or rear-foot elevated split squat. “These two moves automatically set your pelvis in a neutral position, which takes the load off your spine,” says Gaddour. “And if you want to target your quads more than your hams or glutes, you need to have a vertical upper body—something you can’t do with a standard two-legged squat.”

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