Discuss opportunities for participation in a vanety of physical activities outside of the school setting that contribute to personal enjoyment and the attainment maintenance of a healthy lifestyle.

Well first if they are in different physical activities after school they will loss weight depending on what/ how much physical activity there doing. To maintain a healthy lifestyle he/she will need to do some physical activities and eat pretty healthy.

be confident on yourself. ignore such fools and move on ; )

take a break move to stretching and slowly work back into physically exercising if the problem continues go to a doctor or physical therapist