In "Iron Man," Downey needed to put on about 20 pounds of muscle and wear an extra 40 in his costume. Since the suit was made well in advance and could not be altered, he couldn't afford to get hulky.

We’re only one week into the new year, and already we’ve seen Gympact launch for Android, to let users earn real money by sticking to their fitness goals, while Fitsby launched to let you ...