The kettlebell swing challenge is 1 exercise. Kettlebell swings. You do some pull-ups/dips etc between swings but it’s only 1 kettlebell exercise. Look up proper form for kb swings on YouTube, and do it. It’s a conditioning program. Again, your fat loss will mostly have to do with your DIET, but if you’re looking strictly to lean out, this is a way to improve your conditioning, grip strength, posture, glute recruitment, etc.