Jay went to weightlifting camp in the summer between seventh and eighth grades. he noticed that the camp trainer put tremendous pressure on him and on his friends to improve their strength. after an extremely vigorous workout, jay's arm felt extremely sore and weak around the elbow. he went to the camp doctor who took x rays and then told him that the injury was serious because the edge of his upper arm bone was starting to twist off. what do you think had happened to jay? could the same thing happen to jay's 23 year old sister trixie who was about to start a weightlifting program? why or why not?