Thinking a bit more, you might find the "Transformation" Images in these subreddits helpful for your work => https://www.reddit.com/r/progresspics https://www.r

Thinking a bit more, you might find the "Transformation" Images in these subreddits helpful for your work => https://www.reddit.com/r/progresspics https://www.reddit.com/r/progresspics and http://www.reddit.com/r/fitness http://www.reddit.com/r/fitness (of course, all the customary ethical questions about using data and specifically someone's picture will apply)