I get this question all the time ! Very popular topic.
There is lots of research around it , and very contradictory results are presented.
In my opinion and experience the right amount of exercise should be measured like this :
1) Exercise shouldn’t make you feel exhausted. If it does you are over doing it.
2)Exercise should be fun. Sessions that involve bootcamp screamers, lack of respect or anything like that create such a bad association with health. Getting healthier should never EVER be associated with anger. If your trainer uses that tone get a new trainer.
2) Exercise should make you feel alive. Any form of body movement should add so much quality to your life that you feel better at the end compared to when you started exercising. If not, you are doing the wrong activity.
4)Exercise should never be used as a compensatory measure for over eating or drinking. That is a recipe for problems.
5) And for last, the only person that can prescribe exercise for you is a trainer. Not your friend, mum and partner.
Have fun !
For more tips, recipes, and exercises please get my book The Rawfit Diet and my application a Million Workouts by Rawfit via my website www.rawfit.com.au