Which type of execute can be hard on the joints? high impact low impact high intensity low intensity

 high intensity, such as sprinting, or doing cross country is very hard on your joints. 

Maybe meditation,stress relievers,try to have quite time try to get school done on time and try to go to bed earlier

Well, l think that some effective communication is, emotional barriers and lack of attention, interest distraction or irrelevance. also some physical disabilities such as hearing problems or speech difficulties.      l hope i am correct  and you good luck.