Just to provide some balance.. I'm over 50 and up until recently had knee issues ans was 60 pounds over weight (now gone!).
I am not a distance runner - I prefer lifting weights and HIIT. But when I do run distance a pace of 6.3 MPH is a very slow pace for me to maintain for even an hour. On a good day I can run 30% faster than this and only be a bit uncomfortable.
It's all about what you set out to achieve by doing cardio. If you read a book/watch tv on a treadmill in order to burn calories then you are not improving your heart and lungs. In fact your not even burning many calories
It's only if you increase running intensity..week in..week out, that your heart and lungs improve.
I would suggest that if you have been using a treadmill or been running for over six months and you're not more than 20 pounds over weight then unless you can do the intermediate routine with ease then reflect on your exercise programme.
- 1/10/2013 2:41:57 PM