In a hurry to fit a workout in? CUATRO DOUBLES will get the job done and leave you sore the next day. This 10 minute workout gives you combinations that have a set of 4 reps, then a double rep of another move. You get one chance for the base set, then we move on to the more complicated version. Trust me, 10 minutes will fly by and you will be out of breath! Just keep following me and your legs will feel it while your face drips in sweat!