I usually do a 20 km on an indoor cycling bike with varied intensity. (coachcalorie.com)
If you have a lot of space at home, you can of course consider buying a treadmill, indoor cycling bike or some other type of training equipment. (easybabylife.com)
Apart from adding Link as a racer, the Legend of Zelda x Mario Kart 8 DLC adds Hyrule Circuit, a new track filled with Zelda references (like coins being turned into Rupees), and three kart parts: the Triforce Tires, the Hylian Kite glider, and the Master Cycle bike frame. (kotaku.com)