I used to enjoy aerobics classes when I was younger. Now that I'm old, after my morning chores, I put out 4 big puzzle mat squares and do those old moves (low-impact so I don't have to put on a bra or shoes) for 30 minutes or more while my phone plays 135 bpm music and the TV plays Midsomer Murders on silent with closed captions. At 135 bpm, even high-marching in place is aerobic, and adding kicks and punches and dance moves is easy and better for the joints. No choreography, just 8 of something and switch, so I can follow the murder plot. I don't have to change out of PJs or go anywhere or let anyone but the cat see me sweat. Afterwards I stagger into a cooling shower and come out to catch the murderer. I DON'T enjoy working out, and I DON'T get a high from having done it. But I can go to bed at night without doing guilty leg lifts and crunches in bed and waking up my spouse. So I try to do it daily.