That's a mis-TL. If you look at the original text: https://x.com/okmgmk/status/1837807678900285561/photo/4
Tamura says 「ランニングマシンを買ってた」. If her mom bought it for her, she would've said it like 「ランニングマシンを買ってくれた」. So her mom bought it for her own wellness, and her mom is also probably the one using it to store clothes/shoes.