You've been exercising regularly, but now it's summer — and hot. Sometimes even dangerously hot, and seemingly too hot to go work out. But don't decide this is the time for a little summer break from fitness, experts say, because you may be hurting yourself in the longer term."It's important to continue exercising over the summer because the effects of exercise training are rapidly lost once training stops — use it or lose it," said Barry Franklin, Ph.D., director of the William Beaumont Hospital Cardiac Rehab and Exercise Laboratories in Royal Oak, Mich. "Most studies suggest many of the key benefits are lost in four to six weeks of inactivity."To get great tips on being smarter than the heat and to learn the warning signs for heat stroke and heat exhaustion, please visit this Power To End Stroke article.