A treadmill at home makes training both easier and more fun. The resistance is generated by a belt that you can easily adjust if needed.
From Amazon
HOMCOM Folding Treadmill, 1.85 HP Jogging Walking Running Machine, 10KM/H with 12 Pre-Programs and LED Display for Home Gym Office
The Range
Foldable 600W Motor Treadmill Fitness - Black
Robert Dyas
HOMCOM 600W Foldable Electric Treadmill With Safety Lock Led Screen Black