In cross-country skiing, athletes propel themselves over…

I like a physical challenge.

— Victor Wanyama

Playing sick. That is so hard to do. It has to be a total mental challenge, as well as the physical challenge.

— Michael Jordan

I like the physical challenge. It's fun for me.

— Maggie Q

“We were about to undertake the most physical challenge of our lives on a diet the equivalent of s’mores.”

— Jeffrey Gettleman

I do like a physical challenge.

— Alex Brooker

It's a physical challenge. It's a spiritual challenge. I'm studying almost every day a different symphony, not returning to any one for a week.

— Gustavo Dudamel

College basketball was one of the hardest, most rewarding experiences of my life. Every single day on the court was a mental and physical…

— Ashley Graham

The reality is, if you have a high-level-energy dog, it's not going to be happy with a one-hour walk. Those types of dogs are…

— Cesar Millan

Cross country skiing is great if you live in a small country.

— Steven Wright

I'm a sprinter man. We don't jog; we don't walk. It's full-out. It's big engines. You don't take a car that has 600 horsepower…

— Donovan Bailey

I've always wanted to drive cross-country.

— Mila Kunis

“Cross-country skiing is fine as long as you live in a small country.”

— Steven Wright

My fastest time in high school was a 4:29 mile. I think cross-country has something to do with my longevity in my business. When…

— Alice Cooper

I used to race up all the time and started cross-country from about the age of six.

— Denise Lewis

I think one of the laughable things about poor old Brexit is that they're so cross - they're furious with everyone. But this isn't…

— Nicholas Soames