What is more effective: bike, run, or elliptical?
On paper, sprinting on a track would be most effective, followed by the cycle, then the elliptical. That being said, you might not see any differences if you did a study and had 10 guys use each piece of equipment, and then compared the groups at the end of 8 weeks. The bike is preferred for several logistical reasons including that I find it more effective than the elliptical, but with less chance of injury compared to sprinting. I believe that the elliptical machine vastly overstates the amount of calories you are burning when you use it. I would use it only if I have no other option.