Instruct: Classify a review into positive or negative sentiment.
Query: Good overall workout

I am an avid runner, averaging around 35 to 40 miles a week. I thought I was in great shape until I tried this workout! I realized that running only targets certain muscle groups, and I was shocked at how hard this workout was (not to mention how sore I was the next day!). It has really helped me strengthen all of my muscle groups and made me a better athlete overall. It does move fast and it keeps you entertained. It has gotten easier the more I do it, but I think most people will find it challenging. I still dread the upper ab exercises! My best advice is stick with it, get through as much as you can, and keep pushing! You will see results!