Cardio exercises burn more calories and offer greater intensity, while walking is lower-impact and more accessible.
What Is Fasted Cardio: Evidence-Based Benefits and Risks
How Often You Should Work Out For Health, Weight Loss, And Muscle
Workouts
The Benefits Of 15-Minute Workouts Will Blow Your Mind
Can Cardio Exercise Cause Muscle Loss? Debunking the Myth
Meg Lambrych RN, NASM-CPT, PN-1 - Author for GymBird
I did the 12-3-30 treadmill workout for a month — here's my results
Running vs. Walking: Which Is Better for Lasting Health? - The New York Times
Walk this way: How to make walking all the cardiovascular exercise you need
Workouts
Elliptical Vs Treadmill: Which Delivers a Better Cardio Workout?