Do not wear untested clothing and never wear unwashed clothing. Coolmax,Supplex, Polypro, etc. are good choices. Lube your skin - When you increase your mileage all other efforts may fail. It is time for real preventative. There are a variety of lubricants on the market.
Many people use petroleum jelly because it is inexpensive and easy to find.
The Runners Lube that I use comes in a stick, goes on smoothly, stays on well, and a stick last forever. The U.S. Olympic Team's participation in the 2000 Olympic Games in Australia last year was made a little more comfortable thanks to products found here on AthleteGift. Vitality Balm kick starts the morning and helps to keep energy high. In truth, everyone already has a six-pack, but if you cannot see them it simply means they are hidden under a layer of fat. Cardio will reduce your body fat by burning calories.