Taking an ice bath is not going to burn fats, in fact, it lowers your body temperature and slows down the metabolism process. Even though ice bath works incredibly well to manage inflammation but when things come to burning fats, it has little to no impact. Popular authors like Tim Ferris popularise the idea of "Ice Baths for Fat Burn" but you need to understand, when you do any sort of exercise, you're essentially putting pressure on your muscles which leads to the rise of your body temperature and sweating. When you sit in a tub full of ice, you're doing the exact opposite. Ice bath has its own benefits but you can't discount it for your fat-burning exercises.