Linneman wrote: We know about his (very) high blood pressure and have no idea of his diet. However, surprisingly (at least to me), Fred was somewhat of a gym rat. He'd play handball and work out, battling his heredity. And he'd do this with "civilians", blue collar workers not in the business. (information from Taylor's 1989 biography "Fred Allen: his life and wit").
You know, you're right. I have seen unpublished photos of Fred taken for a magazine article in the gym. He had the sparring helmet and gloves on in one, and in the locker room later. He's drenched in sweat, weakly smiling in his soaked sweater and messed up hair. He had a medicine ball too. I guess it's obvious why they weren't published, he looks like a wreck. But he obviously was aware he needed to stay healthy. The chewing tobbacco wouldn't have done much for his personal charm.