Yes, skipping rope is only trivial if you already learned how to do it earlier.
Walking / running up stairs is an easy way to get in intense exercise without much stress on your joints.
KB swings are fine. Just need equipment.
If one is fairly out of shape, than one can benefit from very simplified burpees: just lie on the floor, get up, lie down again. With speed. Add jumping, once you are fitter. Then add negatives of push ups. And full push ups later.
Walking / running up stairs is an easy way to get in intense exercise without much stress on your joints.
KB swings are fine. Just need equipment.
If one is fairly out of shape, than one can benefit from very simplified burpees: just lie on the floor, get up, lie down again. With speed. Add jumping, once you are fitter. Then add negatives of push ups. And full push ups later.