The Best Upright Exercise Bikes for a Low-Impact Cardio WorkoutUpright bikes are a low-impact way to improve your cardio health and burn calories. Here are our top picks from NordicTrack, Sole Fitness, ProForm and more. Lindsay Boyers, functional nutritionist | Mar 15, 2023The Best Upright Exercise Bikes for a Low-Impact Cardio Workout / Published Mar 15, 2023LINDSAY BOYERS, FUNCTIONAL NUTRITIONIST