- Go to supermarket
- Pick up the largest sack of potatoes/cat litter/bulk dry goods you can find (lift with your legs) or two if one’s not enough for you
- Carry them around a bit while you pretend to look at other items (cardio)
- Change your mind, put them back
- Leave without making any purchase
- Repeat until sufficient fitness achieved


The biggest sack of potatoes in my store is 5lb (2.3kg). But kitty litter… that you do have to lift with your legs.
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Damn, that’s a lot of potatoes. Keep lifting!