4. and last think a coach should take into account is what skill level the athlete is at. A child could be four-teen, but have the skill of an eight year old depending on the activity and vise verse. With these four things in mind a coach should be able to keep their athletes safe and not push them to far.
Results of pushing an athlete too far could vary. The athlete could break down, get hurt, quit the sport or all sports, or the worst die. These are just a few things that could come out of a coach pushing his/her students to far.