And once you're doing push-ups you can progress it into the lizard or Spiderman crawl(contralateral motion forward while bringing the body to a lowered push-up

And once you're doing push-ups you can progress it into the lizard or Spiderman crawl(contralateral motion forward while bringing the body to a lowered push-up position) and engage the legs, hips and shoulders. Crawls in all their variants have become my go-to exercise because they are great full-body movements, can be done on many surfaces(tartan running tracks are my favorite, at least for outdoors), are easy to vary further by adding slope or directional changes, and are simple to make loaded by wearing a backpack and stuffing it with weight(just make sure it doesn't fall out).