This friend who happens to be over 60 is on the program to do 100 consecutive pushups, all from a challenge from his older sister. I have looked over the website and its simplicity to increase strength using the basic pushup. We have all done pushups or been exposed to it. As a coach, I will often tell my athletes to do pushups. With the goal of doing 100 consecutively in a 6 week program, the accomplishment is attainable by everyone. Pushups work not only the chest and arms, but your abs and torso. It can easily be done anywhere, does not need special equipment, no need to go to the gym and their program of working out 3 times per week takes about 10 minutes per day. You will be doing close to 100 pushups in the beginning to 150+ in the later weeks. Can't do a good form regular pushup, do one that is modified (against the wall, stairs) and work your progression up. Endurance training works the same with goal to finish a race or 50 mile bike ride. Don't cheat, be honest with yourself and you will be rewarded. I have started the challenge myself and invite all of you to do the same.