"Thigh-worn activPAL" according to the methodology section of the actual study the article is based on. You can find the company's website here, although they

"Thigh-worn activPAL" according to the methodology section of the actual study the article is based on. You can find the company's website here, although they don't seem to sell to consumers. Price should be around $400-500 I'd guess, some study published the price from 2021 which was 348 usd apparently. [0] https://www.palt.com/pals/ https://www.palt.com/pals/