James Jackson

James Jackson is a personal trainer who uses his expertise in strength and conditioning to create helpful workout tutorials that show fitness enthusiasts how to build muscle while staying safe in the gym. He draws on the latest sports science data as well as tried and tested training techniques to get the best results for his clients without them having to live in the gym.

Quads for days: Discover the top 10 biggest thighs in the world.

Should you be concerned about having 11 inch calves?

Learn if your 15 inch calf circumference is big for your height, build, and gender.

Find out if 16 inch calves are big for people who lift weights.

Learn what it takes to build a lean 17 inch calf circumference.

Learn if 18 inch calves are big for a bodybuilder.

Discover what it takes to sculpt lean 20 inch calves.

Discover everything that’s required to build 19 inch calves.

Find out how two “average Joes” got 21 inch calves.

Your eyes will hardly believe these colossal 24 inch calves.