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 what it takes for a natural lifter to perform a 200 pound bicep curl.

Learn the kind of strength that it takes to perform a 300 lb curl for reps.

Learn how much muscle mass you can build with 20 kg bicep curls.

Learn the kind of strength that’s required to perform a 30 kg bicep curl with a barbell and with dumbbells.

Learn what kind of strength and muscularity you need to bicep curl 40 kg and 45 kg.

Learn if a 50 kg bicep curl is an impressive feat of strength for natural lifters.

How strong are you if you can bicep curl 60 kg?

How impressive is an 80 pound bicep curl for a natural lifter?

Is a 90 lb barbell curl enough to build your biceps?

Is curling 100 pound dumbbells realistic for natural lifters?