Instead ... GIVE yourself 20 minute each day ... make it a GIFT ... take a break five times ....with four-minute Tabata HIIT exercise snacks which involve vacuuming/mopping/cleaning/dusting/straightening ONE area in one room ...
What makes it HIIT is that you PUSH to see how much you can get done in four minutes ... it's HIGH-INTENSITY INTERVAL TRAINING
DO NOT GET CONFUSED ... in any day with 30 30-minute time blocks, there are 30 five-minute TABATAs ... there are 25 OTHER exercise blocks for OTHER forms of HIGH-INTENSITY INTERVAL TRAINING ... those 25 other TABATA HIIT time blocks should be used for things like burpees