Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A great way to injure yourself

Every time I used this video, I either flared up an old ankle injury or end up injuring a knee-there's lots of jumps and spins. I don't mean just jumping jacks or running in place, which is fantastic, I means crazy jumps where you spin around or click your heels together. There are parts of the work-out that I love because it's cardio-heaven, but that's only about half.