Here's 5 "don'ts" to keep in mind the next time you are at the gym. 1. Don't try to strike up a conversation with somebody behind you while jogging or running (or even walking) on a treadmill. I saw somebody once fall off, tumble and end up about 5 feet away from the treadmill they were running on by trying to strike up a conversation with somebody behind them while they were jogging on the treadmill. Stay focused on your treadmill cardio and keep your eyes and head forward at all times.  2. Don't wear cologne or perfume while you're [...]