Re: Young 20-something Year Olds...
Well this is the cycle of life. When Humans are born, they have no power, no muscle, no thoughts...., then they get it with time, Have mzximum of each at some stage in life and then these things starts going weak again in some order.
If you keep your emotions good, care for every one, have no negative thinkings for any one and have a positive attitude towards whatever you do, then these good things will help you to think positive and thus increasing the chances of taking good care of yourself as well.
Then,
Do moderate exercise, don't take medicine unless highly desired, allow your body to recover the weakness (if any). Try to eat with someone you feel relaxed with, never eat alone, this will help you to eat and digest well.