Originally Posted by 531Aussie
The low HR thing, relative to percieved effort, could be because you're doing too many hard days a week.
If you're pushing (or over) 40, Joe Friel says that 'older' guys can only handle 2 or 3 hard sessions a week. In my opnion, the hard days have gotta be hard, and the easy days REALLY easy, like 55% mac HR for less than 80mins.
Pushing 40... 4 months to go
I'm not doing hard days, 6-7 hrs aerobic (70-80%) p/w and only 1 or 2 hard sessions.