What Causes Hand Stiffness And Finger Soreness?

Yes, I am a 67 year old active female, work out 3 to 4 times a week with weight machines and do 3 miles on elliptical as well. I have normal weight and no other medical issues. Recently my right hand is so stiff in the morning that I can not close my hand. After working the joints frequently I am able to make a fist, but the soreness remains in the fingers just wondering g if I should seek the advice of a specialist.