The M600 has a robust heart-rate sensor, built-in fitness training, and a battery that can last two days on a single charge.
A few weeks ago, some friends of mine convinced me to sign up for a 5k at the end of August. I haven’t run a distance like that in probably seven years, and I never was much of a runner anyway, but I agreed. How hard could running 3.1 miles actually be? Turns out, pretty hard. My training has been, well, embarrassing.
