Swimming or cycling could be considered well balanced
Are effective for individualized training and for classroom training.
all of the other answer seem unnecessary!!
Explanation:
there is the answer to your question
It is important to consider the source of health information because anyone can write information down on the internet or in journals. This information may be incorrect and harmful to the human body. It is best to know that your information is coming from a reliable, trustworthy source that knows what they are talking about over an unreliable and untrustworthy source. If you look for information on how to get rid of a headache and stumble upon a unknown website that is untrustworthy then you could possibly end up causing your body more harm then before. Knowing who is behind a certain information holds that person/people accountable if your are further harmed using their information but it also put you at less risk for harm.
Hope this helps :)