Instruct: Classify the given review into positive or negative sentiment.
Query: Not challenging enough

I enjoyed this video the first few times I did it when returning to working out after an absence. It does have some fun segments such as the salsa dance but overall it is not challenging for me after working out at the gym for a few weeks and my fitness has improved. I pulled it out today because I needed a quick workout but after doing other things my opinion of it has changed. I didn't feel that the cardio or strength intervals were long enough to do much good, I'd just be getting into it and the instructor would move on to something else. Also, the weight repetitions are done too quickly; I had difficulty keeping up with the tempo without swinging the weights and compromising good form. Many of the weight exercises are isolation moves instead of compound, there are more effective ways to strength train. This is definitely a beginner workout and one that anyone who is serious about getting fit will quickly outgrow.