Good to hear! I am working to get in great shape. It makes it easier without any other time commitments other than work. I'm a popular/fun guy and decent looking. My friends want to have a big "re-releasing into the wild" party for me when the divorce is final. They seem more excited about my prospects than I am.
Of course they are excited for you. Because for the next however long they are going to be living vicariously thru you!
My wife left me all of a sudden after 30 years for a mutual friend (more hers than mine apparently, Look up Hoosier which was my user name until the great cleansing happened a year or so ago) I was completely lost. A friend told me the exact same thing about availability of women at your age, I am older, but it applies down the line, in the service it is called "target rich environment"! He told me that in your 20's women call all the shots, but after 40, way more women then men, and many of the men available set the bar so low that if you have the three P's (Property, Paycheck, Personality) that you will be in high demand. He was spot on. I know that I have improved more than one marriage. The husband talks to me, finds out how easy it is to date, tells his wife all the stories (hoping she will up her game a bit, and they have!) and has enjoy the benefits, both in the hearing and telling of my stories.
Time is your answer. I am 5.5 years out from DDay, it took me a couple of years to even start to feel right (length of marriage affects length of recovery) and even in the last year I feel better, work better, than ever. Time is your answer my friend.
So sorry you are here, but I believe in the future you will thank your lucky stars that you had no children with her. Find a good woman, they are out there.