- 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


In the store where I work, we sell a 10kg (~22.1 lb) sack that’s superb for getting my reps in, but yeah, lots of things might work for you! :)
Damn, that’s a lot of potatoes. Keep lifting!