MCP (thumb) and smartphones vs dumbphone
I need to buy a new phone, and an idea struck me - what if my weak left thumb has gotten weaker due to the way I use my smartphone?
I've always had a very lax MCP on my left hand, which was great as a party trick back in the day, but at this point I can't hold a glass of water without my thumb suddenly bending the wrong way. When I made the switch from physical keypad to touch screen, I got into the habit of resting the corner of the phone on the thumb muscles, and only typing with my right thumb and index.
Now my left thumb has noticably less musclemass than my right thumb, and I find it progressively harder to grip and pinch. Obviously I need focused exercises, but I'm curious if there's any merit to my idea that reverting to oldschool keypad can help me rebuild muscle tone in between the exercises.
So tell me about your wonky hands and how you use your phones, and especially if you've tested different grips. Articles and anecdotes are very welcome too!