Originally Posted by Marcos Avellan
I'm willing to argue that the psychological benefits of remaining upright will easily overcome and physiological benefits of bending over. Bending over is not a combative stance... it is a "we are done" stance. Whether or not blood is pumping easier or not is irrelevant since you are communicating to your body and mind to shut down.
That is my opinion at least.
Psychological effects are dependant on if you believe they are. If you believe that your posture between rounds matters then it will, your opponents beliefs count as well. Most people need to calm down during combat to slow their heart rate and be more metabolically efficient, not become more aroused. As long as you don't see bending over at the waist and breathing heavily as a sign of weakness then it won't affect you negatively. If you believe it is a sign of weakness it will have the opposite effect you're talking about. When you're in a fight it's unusual for you to have to tell your body and mind to go, generally speaking people are too aroused and that impairs fitness and recovery. Everybody has a different level of optimal arousal and how the athlete perceives that arousal is correlated to successful performance.