Workout recovery for over 60

I swim about 1600-2000 meters (short course) a couple of times a week, sometimes three. I'm looking for advice on how to improve my recovery. While I'm working out I feel great, but after, and for a good 24 hours after, I feel completely wiped out. I find it difficult to sleep after a workout (takes the form of waking up a lot during the night), which feels so counter-intuitive if I'm so spent and feeling good about it. 

I have never taken vitamins or supplements, only because I've never felt I needed to. But I figure I must be nutritionally deficient in something. I'd like to improve these recovery periods. Any advice?

Parents
  • Are you doing non-swimming workouts? If you are only swimming for exercise twice a week you might not be getting enough carryover of conditioning. 3 times per week is much better than 2. Also how intense are your workouts as that certainly makes a difference. 

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  • Are you doing non-swimming workouts? If you are only swimming for exercise twice a week you might not be getting enough carryover of conditioning. 3 times per week is much better than 2. Also how intense are your workouts as that certainly makes a difference. 

Children