Bethesda: Great biking-to-work weather this week! Can I ask you to post this reminder to all the bicyclists on the Capital Crescent Trail: The trail is getting much more crowded with bicyclists and joggers, so please be polite and warn when you're passing!

Howard: Always good advice -- and let's extend the suggestion to Rock Creek and Mount Vernon and Custis and all the others. Too many things to go wrong, and simple etiquette is not only nice, it's good risk prevention.

Treadmills: Hi. Try setting the incline on the treadmill to at least 1 percent for every workout. This helps counteract the effect of the belt helping you along. Doing intervals by varying the incline instead of the speed is another good way to ease the transition from the treadmill to running outside.