Some sources tell me that my resting heart rate is my heart rate taken first thing when I wake up, before I get out of bed. Other sites tell me I just need to sit or lie down until relaxed, and that's my resting heart rate. When I wake up in the morning, my heart rate is between 45 or 50 bpm, but when I take it in the afternoon when I've been sitting reasonably still for an hour or more, it's more around 60. Argh.