Which is the least reliable source of health information a medical blog or scientific research

Hello! This would depend on whether the medical blog was a .edu or .gov or.com so on. If it is .edu it is more reliable, but if it's not I would have to say a scientific research, because scientists follow the scientific method which ensures that the data collected is 100% true in the end!

~I hope this helped!

I am, yours most sincerely,
Joshua A. Bunn

Yes you do , which is cool

People who utilizes the progression principle will ensure their exercise program increases in frequency, intensity, time, and type. the changes need to happen gradually in order to ensure they make gains in their fitness program. a person who doesn't utilize the progression principle can still gain health benefits from exercising, but will not continue to improve in cardiovascular fitness.