Gone and done it

I've done something to the area around the inside of my right elbow...it felt fine yesterday but I woke up during the night in excruciating pain and now....am unable to fully extend my arm. See....this is what "working out" does to ya! I've been suffering with "tennis elbow" in the other arm since last June!! It either means, I'm too old for this, don't know how to "curl" or should just give up and turn myself into a "Babooshka" (slang for "old European grandma").