You control the snowboard with the help of balance and weight shifting. Especially for beginners, it can be unusual at the beginning to stand sideways to the slope - and not straight towards it as in skiing. However, the coordination between legs, body movement and the use of the arms makes skiing more challenging. All this has to be perfectly coordinated.
Both sports are physically demanding and can leave you with sore muscles the next day. Skiing and snowboarding mainly use the thigh muscles, the buttocks and the calves. Snowboarding also involves weight shifting. This also increases the use of muscle groups in the back and abdominal region.