Ok, heres my background. Ive signed up to ride Tour de Cure, which is a ride to benefit the American Diabetes Association. Now, I was riding regularly to train for about a month in December. The ride is now 24 days away, and I have just now gotten back to training due to illness and a shoulder injury. What should I be doing to improve my current condition so that I can do the 80 mile ride? My distance now is about 20, but after that, I have no endurance left. Please make recommendations. Im about 5'10" and weigh about 185 lbs (I should weigh about 155, but due to a knee injury, the medication I was on caused me to gain almost 70 pounds). Any help would be greatly appreciated.