Certainly, Golf
You might associate golf with a sport of luxury. However, for Gates, it's an exercise that 'nourishes the mind and body.' According to GQ, playing golf improves heart health and reduces stress. It requires a lot of walking and strategizing, which keeps the brain active.
The benefits of golf can be summarized as follows:
You can get closer to your daily step goal by walking during golf.
The swing movements engage various muscles, keeping the body physically active.
It requires intense mental analysis: considering factors such as the angle, the stroke, the wind condition.
Constant decision-making, planning, and problem-solving are triggered, which supports Gates' strategic abilities in his professional life.
Other favorite activities of Bill Gates include reading books and playing a strategy game called Bridge. Reading books directs Gates towards learning new topics and deep thinking. The card game Bridge, which he learned from Warren Buffett, helps to maintain strategic thinking and sharp memory.