I've just done my first run of Week 2-Yay! Keeping running for all of 90 seconds was a fair challenge, and I found myself using my arms much more to help with momentum. Infact, I actually felt like a really exaggerated and over-the-top movement, but really seemed to help, in much the way you'd really use your arms in a very dynamic way if you were sprinting (but I was just doing a very gentle jog). Do you think that's usual? Is that something you would do if you were putting in miles? Or would it use up on much energy?