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Learn how to build the kind of definition that finally makes your quads pop.

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?

Julia Ries Wexler is a writer focusing on all things health and wellness. She has over 10 years of experience in health journalism, and though she has written about pretty much every health topic ...

Strengthen and tone your thighs with this powerful quad-focused yoga pose! Perfect for building lean muscle, boosting leg ...

The quads are one of the largest muscle groups you can train, so working them increases your overall leg strength for exercises like squatting, lunging, leg pressing, and other lower body exercises ...

What is a Quadriceps Strain? The quadriceps, often shortened and referred to as the quads, are a group of muscles located on the front of the thigh. The quadriceps are actually four different muscles ...