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.

Learn why it’s absolutely impossible to get 50 inch biceps (and why you shouldn’t try).

Find out if your 16 inch biceps are big for your height and build.

Learn whether having 15 inch arms is good or bad for a natural lifter.

Learn if 14 inch arms and 14.5 inch arms are big for your height and build.

Discover whether your 13 inch arms are big, small, or just plain average.

Learn if your 12 inch arms are a normal, healthy size for your height.

Should you be worried about your small, 10 inch arms?

Should you be concerned about your 11 inch arms?

Do these 3 bicep case studies prove that you can get 18 inch arms naturally?

Are 17 inch arms big for a natural lifter? Hint: It depends on your height and body fat level.