If you can tolerate and digest cow’s milk it may be a better beverage to consume than a surgery sports beverage. Isotonic sport beverage like Gatorade do provide better hydration when the body has lost salts through sweating. However, the sweet content off these drinks can damage teeth if constantly sipping on them throughout workout. Also, refined sugars are generally best kept to a minimum in diet. Humble old milk has protein, natural sugars and amino acids perfect for post recovery hydration and nutrition. Further scientific study needs to be done for a definitive answer the question of sports recover is enhanced by cow’s milk… but in the meantime… why not try it and see how you respond? Get good quality organic non homogenised milk. 1 litre of top shelf milk probably costs the same as a Gatorade.
https://time.com/3656660/workout-drink-milk/
https://jissn.biomedcentral.com/articles/10.1186/s12970-019-0288-5