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.

Discover the elite group of lifters who managed to perform a 100 kg bicep curl.

Learn what the science has to say about the average arm size in males and females.

Find out what it takes to build 25 inch biceps.

Here are 3 pairs of eye-popping 26 inch biceps.

Learn how one weight lifter built his 27 inch biceps.

Learn the ugly truth behind these bodybuilder’s 28 inch biceps.

Meet the middle-aged Brazilian man with colossal 29 inch biceps.

Meet the bodybuilders with 30 inch arms.

Your eyes won’t believe this man’s record-breaking 31 inch biceps.

Learn why building 40 inch biceps is completely impossible.