Stop Looking at the Clock
One of the things I really like about the group I now run with on weekends is they are punctual. We start early, and we start on time. With my other training group, we started an hour later and still people would show up really, really late. These late-comers tended to be younger, though not always. In listening to an NPR report earlier this week, I think maybe now I know at least one reason why these groups are so different. Members of my current running/walking group are all middle-aged; the other group had a lot of 20- and 30-somethings, and they operate on a different circadian rhythm. You see, as we age, our bodies still require the same amount of sleep but not necessarily at the same time. Our circadian rhythm is triggered by a natural fall and rise in body temperature. When we are younger, the core drops later in the evening but doesn't rise until later in the morning -- thus, as teenagers, college students and young adults, we tend to stay up late and sleep in on wee...