PLEASE CONSULT YOUR MEDICAL PHYSICIAN BEFORE ATTEMPTING ANY FITNESS TRAINING. VIA WebMD 1. Be Consistent Chase Squires is the first to admit that he’s no fitness expert. But he is a guy who used to weigh 205 pounds, more than was healthy for his 5’4″ frame. “In my vacation pictures in 2002, I looked like the Stay Puft Marshmallow Man at the beach,” says the 42-year-old Colorado resident. Squires decided enough was enough, cut out fatty food, and started walking on a treadmill. The pounds came off and soon he was running marathons — not fast, but in the race. He ran his first 50-mile race in October 2003 and completed his first 100-miler…