It sounds similar to Escalating Density Training. In that you take two opposing muscle groups e.g. Biceps and Triceps with two exercises like curls and pushdowns. Then you take a weight you can lift 10 times max on each one. You set a timer for 15 mins then do as many curls as you can then straight onto the pushdowns then back to the curls and so on. I've not tried it but proponents say it's good for people who don't want to do cardio and weights but feel they should do both.
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