Yeah, whatev', but the couple of activities we all do, walking a 20-minute pace or cruising/coasting <10 mph on a bicycle (I'm assuming they mean flat pavement or they'd have said so) - none of that raises our HRs over about 90 bpm (50% of max, 180% of resting), right? So wear a HRM doing your ADLs. I'm thinking the only people who aren't getting that much activity either are the kind of people who get home from their desk job and collapse in front of the TV for the rest of the night ... or the ones who are injured/sick/disabled and really would like to be doing more if they could.