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 what it takes to build a muscular 51 inch chest.

Find out just how big a 54 inch chest and a 55 inch chest really are.

Learn what it takes to build a 52 inch chest (and find out who actually has one).

See what it takes to build a 56 inch chest and a 57 inch chest in real life.

Find out who has a 60 inch chest in real life and discover if it’s possible to build one naturally.

Find out what size a 36 inch chest is and discover if it’s small for your height and build.

Learn how big or small a 37 inch chest is for your body type.

Find out the average neck circumference for males, females, children, and teenagers.

Learn why an 11 inch neck is far too small for an adult to be healthy.

Learn how big a 15 inch neck really is, according to science.