Can't give exact links but, the most common fitness and advertisements can be related to certain public gyms for workouts. (Look on sites that your local gyms have). And for overall health try looking at protein bars for fitness (SlimFast, Whey Protein, etc.)
It has been well known that internet is useful as well as disastrous for the people. People should know how and when it should be used in order to make perfect use of it.
There are many advertisement flashing every day which show the adds of proteins powders and supplements which is useful for the people involved in this field such as body builders and wrestlers.
But the youngsters also gets influenced by it ans starts taking supplements at a very small age which is harmful for them.
if you want to stay healthy you always have to eat good foods and go to the gym to stay in shape.if you eat good foods like your fruits and vegetables those are good for you body and help you too.