5 years ago when I was 62 I started noticing my hands being extremely stiff and painfull to close and open my fingers when I woke up in the mornings. I was afraid that this was arthritis. I started working out with grip strengthening exercise tools from Captains of Crush (just the Trainer model) and after a few days the stiffness and pain went away. Now, every few months and it comes back, but, just for a few hours in the morning and it's gone for several more months. I'm not sure what it is, but, it feels like what people describe as arthritis symptoms.