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.

Find out how broad 19 inch shoulders are for both males and females.

Learn how broad your 20 inch shoulders really are, according to anthropometric research.

Find out how broad your 21 inch shoulders really are.

Are 12 inch shoulders too small for a healthy adult?

Learn what 13 inch shoulders look like and find out how small they really are.

Here’s what anthropometric research has to say about having 14 inch shoulders.

Find out how wide 15 inch shoulders are for men and women.

Learn how small 10 inch shoulders are and find out if it’s possible to put an additional 10 inches on your shoulders.

Here are the mass monsters with the broadest shoulders in the world.

Learn why 23 inch shoulders are extremely broad.