Physical Training For The Mental Toughness

I can vouch for Walter Browne especially after reading his 1970's blog in which I believe he states he does pretty much the same as Bobby Fischer in preparation for chess. He played tennis at the time having mention he beats ninety per cent of his tennis opposition. At the time we played a set of tennis at the rose gardens on a tennis court I remembered him oh so well it isn't often where I hung out that a celebrity would show up but make no doubt about it people would point and stare knowing that the number one ranked chess player at the time in the 70's was on the tennis courts where I too on occasions would hang out to play tennis. It was there we met and agreed on a pick up game he probably had seen me before we rallied and then we figured the both of us were ready to do battle and play some tennis a set at least. The score was close but I knew I was far from playing in the zone. But I could clearly see he could be in the lead when challenging pick up tennis players at the tennis courts. So do professional chess players in the circuit do workouts like tennis to be more fit for the mental war games in chess? In the case of Walter Browne and having seen Bobby Fischer on a talk show on the Dick Cavette television show speaking of his tennis workouts to make him a better chess player I'd have to say yes some of them do workout and tennis was good for them...bicycling is my physical workouts.