Cold-water swimming is not for everyone, though those who do enjoy a dip in ice water usually experience less illness, thicker hair and clearer skin, according to an article clip shared on bbc.com. This video is from BBC Future, which challenges strange illnesses and myths in medicine.
Cold-water immersion, also known as an ice bath, is usually associated with sports therapy regimens because some athletes and trainers believe that it helps speed the body’s recovery from strenuous exercise by easing the muscles’ inflammatory response. The water would have to be below 16 degrees Celsius (or 60.8 degrees Fahrenheit). There are claims that it’s therapeutic, and can possibly even help reduce depression and also help fend off cold symptoms, though there is nothing definitive backing this. However, for the people who are not used to the cold, jumping into a vat of ice cold water can be a mistake; it can even be fatal due to the cold shock (it’s usually experienced before hypothermia). For the uninitiated, a “cold shock” occurs where the body panics and forces involuntary breaths or hyperventilation, which can cause an individual to ingest water until they drown. Vasoconstriction also happens in response to conserve heat, which makes it harder for the body to pump blood throughout the body, which could bring on a heart attack.
So, in the end, its up to you. If you are in good shape and your heart is pumping strong, and you think you can mentally handle that “shock”, then go for it.