Weak wrists

[AAOBob]

I'm looking for advice here for my wife. Shes doing All Pros routine currently but has had chronically weak wrists (as in forever) prone to tendonitis. Shes doing some wrist strengthening exercises but I have no experience at all to help her there. It makes doing a standard pushup painful and she does other fitness activities where this is a major impediment.

So my main question is what sort of frequency do you use with this kind of exercise? Daily? Just on All Pro days?

[The3Bar]

I can only suggest one exercise I've seen someone do to strengthen their wrists...

And it involves a modified standard push-up. Rather than have the palms face down on the floor, make a fist and while keeping the lower-arm (from elbow to fist in a straight line. Similar to punching the floor with both arms. I believe these are called knuckle or fist-pushups. Recommend googling and finding some videos for correct form, like thumbs face forward versus turned fist.

This should help strength the tendons in the wrist over time.