This is exact fitness foundation that I initially teach my own personal training clients in the gym. (tomcoffeyfitness.com)
It's guys like these that inspired me to leave the gym and start training my clients with bodyweight exercises. (ashotofadrenaline.net)
I've been telling my personal training clients for years that «when you workout hard it should be short and when you workout long it should be easy». (personaltrainermtkisco.com)