Courteney Cox in Black Workout Gear Plays Tennis To No Doubt Song

Courteney Cox's passion for tennis is no passing phase—the actress loves playing the game, and she also loves to post pictures and videos of herself with a racket in her hand. Cox, 59, shared a hilarious video where she's playing tennis from various locations in her home throughout the day, set to a No Doubt song. "I'm just a girl 🎾," she captioned the post. Here's how Cox stays fit and unhealthy, and her best beauty tips.

Cox swears by the health and beauty benefits of cold plunges. "I just believe in hydration," she told Glamour. "So if that's called flooding, or slugging, or slagging, I do it… I thought I would never do a cold plunge. I thought I would hate it, but I love it so much. I feel great for hours afterwards. So as much as you dread getting in, you know that you're going to feel so good."

Cox loves the Tracy Anderson Method. "My fitness philosophy is to be active in life and enjoy what I am doing," she told GOOP. "I have always loved exercise and feel that being active is important to maintain not only physical health but mental health as well. I stick with the Method because it is a constant challenge. As soon as I have mastered a certain exercise they throw something else at me. In my hour and half workout sessions I have had a mental challenge and a physical challenge."

Cox is a big fan of sauna sessions. "In the afternoon I take a sauna, a hot sauna," she told Glamour. "I use water with essential oils on it so it becomes steamy. It's not infrared; it's just a pure hot sauna. Then I get into my cold plunge. The dopamine hit you get is so, and I shouldn't say, it's like a drug. I actually haven't taken a drug that gives you a dopamine hit, but that's what this does. And it lasts a long time."

One of Cox's best beauty tips is to protect your skin from the sun. "Don't lay in the sun and don't fry," she told Harper's Bazaar. "I always say to my daughter, Coco, your skin is incredible. Let me show you my chest. Then she's like, mom, I would never have that kind of skin. I'm like, yeah. Your face you always look at, but you forget your body. Wear sunscreen and care about your body. Really use the right products because it catches up."

Cox knows to never read the comments on social media. "On my Instagram even, I will read the first, maybe I'll just look at whatever a friend might say, but then after you get to a certain point, it's going to start getting mean," she told Glamour. "So I really don't read comments and I'm just also kind of used to it. I'm so self-critical that you probably couldn't say anything that I wouldn't have either thought myself, unless you're just mean and then it's just, I can't relate to that."