You present a good question because I know as trainers we run into this frequently. In my experience, most of the time it is simply lack of strength and stretch in the wrist and forearms and there’s excellent “how-to” advice here in how to address that. Some clients are relieved simply by rolling the end of their mat up under the lower palm of the hands (or use small folded towels) – giving a little lift and, therewith, shifting some of the load off the wrists. I also cue the client to push the body’s weight around and through the flexed wrist, out the whole of the palm and out the fingers, not allowing the body’s weight to stop dead at the wrist (helps in doing planks too). Many times being conscious of this also helps.So, if all is medically sound, as so aptly pointed out in this forum, then we’ll focus on that area to build it up and progress from there. Especially women, Susan, I think we don’t even think about that area much, till it’s a problem, not like the men do. I love push-ups and I like to see my clients able to do them if at all possible. They like it too. I hope this helps working it out!