Bruno,
When I was diagnosed with arthritis my Doc said to buy a bottle of the glucosamine, enough for a month. I can't remember the dosage, but 1000 mg / day comes to mind. Anyway if I didn't notice a difference in a month, don't bother buying another bottle. Apparently the glucosamine doesn't work for everyone. It won't hurt you to give it a try.

But keeping moving is important. I find keeping warm is also important, so I'll wear gloves in the winter now, when in the past I'd just tolerate my hands being a bit chilled. Of course at this very moment, my cat Bonnie is doing her very best to keep my left hand warm - she's partially on my lap, and partially draped across my hand. At least I can still type (sort of).