Not only does Tagamet HB prevent heartburn before it starts, but it also safely controls the production of stomach acid for hours and hours -- something antacids, such as Mylanta(R) and Maalox(R), can't claim.
A sedentary person just beginning circuit training that exercises three to four days a week at a moderate-intensity should begin to notice some initial improvement in aerobic endurance within one to three weeks, according to the American College of Sports Medicine.
The author's thesis is it only takes 10 hours of week of riding including anaerobic sessions to raise your fitness level to be able to ride at 25mph. If your in excellent shape already the program will probably work for you but if you're a casual rider the training level wont get you fit enough to do it.