I had an overuse injury in my knee and through rest and stretching, it's mostly back to being pain-free and functional. I've also been away from home and eating like ... er ... well, not so well. So between the two, I need to get back at it and have downloading myfitnesspal to my phone and gotten back into my running shoes. Soon I'll be home and back in the saddle too.
What's the deal with 'target heart rate'? I read that I should be at about 160bpm, but when I do that I don't feel like I am really pushing myself, and I really want to be able to run faster, farther (and I have a goal of being fit enough that my resting heart rate drops back below 70). Is it bad to work to 190, keep it there for 5 minutes or so, and then ease up until I go back down to 160, and then repeat? I feel like I am really getting a workout when I do that, but feel like I'm breaking some 'rule'. And I don't really want to hurt myself again.
I am watching what I eat, but on days I exercise and burn more calories, how important is it to eat more calories to compensate and keep my 'net' intake above 1375 (estimated BMR)? Does it really matter all that much on a daily basis, or can I just make sure that the weekly total averages out high enough?