Joined: Dec 2004
Posts: 12,548
Likes: 797
From: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, Catrike Speed
I have a Garmin 500, and just recently added a Mio Velo to register my HR. What it usually tells me is that I'm already near 90% and I should slow down.