In the colder months I love taking contrast showers to improve circulation. My showers are super hot then I'll turn the dial to freezing cold for at least 20 seconds! It's sooo invigorating and such a silly way to start the day. I always giggle and squeal from how crazy it feels!! It can help reduce muscle soreness by moving lactic acid out of the muscles so I love it for my sore neck and shoulders or after a hard workout. Some people also think this type of shower can help detoxify the body and improve the immune system. Either way it's energizing and gets my blood flowing, let me know if you give it a try!