Leg extensions are one of the most effective exercises for isolating the quadriceps. Unlike compound movements like squats or lunges, the leg extension machine specifically targets the knee joint, ...

If you’ve spent any time in a gym, there’s a good chance you’re familiar with the cable machine. This functional piece of exercise equipment, also referred to as a pulley machine, is a staple in many ...

The leg extension, or knee extension, is a type of strength training exercise. It’s an excellent move for strengthening your quadriceps, which are in the front of your upper legs. Leg extensions are ...

That group of four muscles lining the front of your thigh deserves singular attention. This classic quads exercise is our favorite staple on leg day. Unlike compound exercises, isolating the ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Ready for leg day?

Jakob Roze, CSCS, is a health writer and high-end personal trainer. He is the founder and CEO of RozeFit, a high-end concierge personal training practice and online blog. Squats train all the major ...