Five questions you should ask yourself when trying to determine if a source of health information is reliable and trustworthy

Has a .gov,.edu 
is it from a person with a professional degree
is it a informative site or a blog?

When the information was last edited and like if it's really old then it's probably outdated

No it doesn’t hurt depending on how many fingers they use

The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)