Wimps, listen up! There's an easy way to make yourself look tougher without all the hassle of pumping iron and all that Charles Atlas nonsense.
Just listen to your mom and stop slouching:
Mothers have been telling their children to stop slouching for ages. It turns out that mom was onto something and that poor posture not only makes a bad impression, but can actually make you physically weaker. According to a study by Scott Wiltermuth, assistant professor of management organization at the USC Marshall School of Business, and Vanessa K. Bohns, postdoctoral fellow at the J.L. Rotman School of Management at the University of Toronto, adopting dominant versus submissive postures actually decreases your sensitivity to pain.
The study, "It Hurts When I Do This (or You Do That)" published in the Journal of Experimental Social Psychology, found that by simply adopting more dominant poses, people feel more powerful, in control and able to tolerate more distress. Out of the individuals studied, those who used the most dominant posture were able to comfortably handle more pain than those assigned a more neutral or submissive stance.