I do this all the time. Once I have my workout clothes on it just seems stupid to take them off before they're sweaty. It's a mind game. :) I always feel so guilty if I'm in workout clothes but don't exercise!
"Build a stellar set of ABS for 2013 with this intense, 8 exercise abs workout plan" . "HAD TO PIN AGAIN! This abs workout is really awesome! my abs are way tighter in just 3 days! PIN THIS NOW! You need a large workout ball and a weight" - Laurie :)
Another take in the sock bun! Push the sock down to the bottom of the pony tail. Spread the hair out around the sock and secure with an elastic. Braid the remaining hair wrapping it around the bun, pinning it down till its secure.