The following medical conditions are some of the possible causes of Wrist weakness. There are likely to be other possible causes, so ask your doctor about your symptoms
some of them are
Diabetes Peripheral artery disease Peripheral neuropathy Peripheral nerve trauma (see Nerve symptoms) Peripheral nerve compression (see Nerve symptoms) Sciatica Cold Cerebrovascular accident Impingement syndrome Compartment syndrome Osteoarthritis Bone fracture Hypokalaemia Hyperkalaemia Pyramidal tract injury Upper motor neuron disease Lower motor neuron disorder Dermatomyositis Chronic fatigue syndrome Brachial plexus injury Claw hand Ulnar nerve palsy Saturday night palsy Wrist injury Carpal tunnel syndrome Complex regional pain syndrome Prolonged immobilisation Rheumatoid arthritis
I have weak wrists because I use them all day long at work (hairdresser). For me it's just over-using them, and I'm lactose intolerant so I don't drink as much milk and dairy as I should = calcium for strong bones.
over use, genetics we use our wrists a lot so its pretty easy to get tendonitis and arthitis