We look into some research, as by popular demand... you guys like that... so, 8 of the best heart rate activity trackers, we discuss the accuracy of them all. and what you should be doing with them. the next bit is how young is too young to start training? Pre-adolence? Puberty? Teenager? adult? lastly what is happening at the hip when knee flexion happens in a squat... form 30 degrees... to 105 degree knee flexion. oh... and we have some poor cereal choices...