I love three level workouts because they not only give you a clear sense of progress, but also because they keep your workouts interesting! Even if you’re on level 3, try going back to level one and see how far you’ve come, how much more you can do! A good way to track these workouts is to record how many CORRECT reps you’re able to do and how many times you stop for rest within that one minute.
Really try to give this your best, the harder you work the more you’ll get out of it and with school, work, activities, and everything else that keeps us busy I know (for me personally) I need to make the most of my time, especially with exercise!
It says this in the post but it’s worthy of repetition: you must do cardio to see true strength results. Cardio burns fat and, although I’ve built some cardio into this workout to get your heart rate up, I highly recommend doing 20-30 minutes of cardio in addition to this. Personally I like to run 2 miles (walk a little for a warm down) then do my strength training, it not only burns fat, but also, more importantly for me, warms up my muscles which helps prevent injury and helps me perform better!