When I started the Shred It! challenge, I thought it was supposed to go 13 weeks. However, I discovered that the journal I've been using for the challenge will last a few weeks after the 13 weeks. I think the reason for this is that the author planned for the users to write in it 7 days a week and I only kept track of the 5 days a week that I worked out. In any case, I'll keep going as I can't wait to see the results of the challenge.
I have been doing strength training, really focusing on my muscle, for the past 3 years or so in an effort to tighten my loose skin after weight loss. However, the Shred It! challenge marks the first time I've seen this kind of progress. It really amazes me that the results I'm getting are without animal products. I had turkey and eggs a few times a week before going completely vegan at the start of the challenge. I used to think those animal products were necessary for muscle building but it did not yield the kind of results that I'm getting now with plants only.