I run 3-5 miles every other morning but struggle maintaining a decent pace past the 3 mile mark. I'm applying to join the RA, so should I just concentrate on the 1.5 time which is lingering around 11.20 or stick to some longer runs? I used to use the Nike+ up until it packed up, found it didn't really help other than showing me where I slowed down and how far I'd been etc. I'll be the first to admit I'm shoite at running but would a heartrate monitor help me with my stamina? If it would, how on earth do you use them?