Strengthening the muscles of your thumbs can help you grab and lift heavy objects.
Try this exercise to strengthen your thumb muscles:
FitBalls Hand Exerciser alleviates repetitive strain injury. The three color-coded fitness and therapy balls of increasing resistance will strengthen and restore flexibility to your fingers, hands and forearms. It's a great hand exerciser and hand strengthener.
SmartSole Exercise Insoles convert your everyday shoes and sneakers into toning shoes and relieve pressure on your joints & back. The built up arch support make these great insoles for flat feet and insoles for shin splints. and the gel insert in the heel strike absorbs shock and provides plantar fasciitis relief.