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Don't Overdress

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Overdressing has tripped up many a first-time runner. As a rule of thumb, dress as if the weather is 15 degrees warmer than it actually is since that is approximately how much you'll heat up once you've hit your stride.﻿﻿ So if the weather report says that it's going to be a comfy 75 F, pretend that you're in Florida where it's a balmy 90 F.

If it's cold outside, wear a few extra layers of clothing that you can strip off as the starting time nears. Many races will offer a gear check counter where you can store your gym bag until after the race.

If hot temperatures are forecast, spend a few extra dollars to buy running gear made of cooler, moisture-wicking fabrics. Alternately, opt for looser-fitting clothes along with the appropriate sunscreen and sunglasses.

And while you're at it, take the time to time to trim your toenails. Doing so will save you a lot of discomfort (and a case of black toenail) if one happens to be too long.