I've been using P90X workouts on & off for about 4 years. Today was Core Synergistics, and for the first time, I was able to do 50 reps of steam engine in time with the video. No rest in between.... not 43 reps..... but the full 50. (and carried on with the next exercise, too, as opposed to collapsing in a heap on the…
I recently purchased a new HRM (polar FT 4), and I've used it for four of my workouts so far (love it, by the way, for those who ask about HRMs). My question is probably a technical one.... does anyone know how "smart" this little device is? I'm wondering if it knows to adjust the calories burned based on whether you're at…