Mr Lim Tiong Jee, 71, is fitter now as a retiree than he has ever been his entire life.
"I wanted to gear up to spend my retirement meaningfully, not as a couch potato," says Mr Lim, a former manager in a petrochemical multinational corporation.
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A version of this article appeared in the print edition of The Sunday Times on November 24, 2019, with the headline Not just any grandparents' holiday: Seniors are getting fitter, going faster and wandering farther. Subscribe