The repetitive movements required in playing instruments such as guitar or piano make musicians vulnerable to arthritis. Paradoxically, studies have shown that the finger movements and exercise related to playing can actually help arthritis sufferers. MakingMusicMag.com, the lifestyle resource for music-makers, says arthritis sufferers who began to play an instrument improved the dexterity and strength in their fingers and other muscles and advises musicians to practice for shorter spells and to stretch and warm up before performing. There are even hand strengthening tools on the market that allow you to strengthen your hands and improve the dexterity of your fingers.