As I mentioned the other day, I have restarted the 100 Pushups and 200 Situps programs. Something I noticed, both this time around and last time, is that my posture has improved a bit. I sit a little straighter. I stand a little taller. This feels like it is a result of the exercise, but is it psychological or physiological? Is it me being more happy and confident or is it my body improving as a direct result of the exercise? The real answer is that it is probably some percentage of both, but in what proportions?