Exercise might be a good thing, if the grammar don't getcha

I have just completed a 20-minute exercise routine - my first since October. This is a measure of how deep my depression has been, but also a sign that I am pulling myself out of it at last. I've never gone this long without any exercise before, and it has felt truly awful to be so out of shape, but until today I just have not been able to make myself do it.

Suddenly this afternoon, I was ready.

The black lining to my silver cloud appeared at the end of the video when the woman said, "You have just did the whole routine, now doesn't that feel good?!" Oh, the pain!