Swimming those laps before or after the periods of the sun's intensity might be of benefit, too.
And you might want to look into the newest To Your Health Spa & Fitness business opening soon on Rt441/27 in Lady Lake
http://tooyourhealthspa.yolasite.com/ They participate in Silver Sneakers and Silver & Fit Experience programs- so much more than just laps - and a variety of memberships, too.
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Not sure if I have free time...or if I just forgot everything I was supposed to do!