Most people who try curling are surprised at how physically demanding it can be. It actually makes for a great work-out!
While not a necessity, a greater level of personal fitness certainly helps.
That being said, what makes curling great is that this sport is a lifetime sport with curlers starting as young as 10 years old, and many play well into their 70's, 80's and even 90's.
Most people are not natural born curlers and simply require lots of practice to improve their skills/balance, which we try to build into our beginners program. As well, playing alongside other experienced curlers helps significantly in the learning process.
Most people who are moderately fit easily find the ability to play within their grasp, and that the main problems that keep people from curling are a poor sense of balance, bad backs, ankles, or knees.
5940 NW Waukomis Drive, Kansas City, Missouri 64151