Some time in the last 12 months, there was a real suggestion that Serena Williams should play a competitive exhibition game against Andy Murray.
Obviously, Murray would win, but the general consensus was that Serena would not win a game. The consensus was that she would not beat any of the top 100 men... and probably you'd have to get a long way down the men's rankings to make her competitive.
That surprised me at the time, as Serena looks so strong and skillful. But I suppose it's correct.
1400 calories... that's roughly the same as a typical runner would burn in the same time... and yet the runner is heaving perhaps 80kg of weight over a distance of many miles.... whilst the driver is just sat on his backside (or her backside) throughout. I knew F1 drivers have to be super strong, but amazing that they can physically burn so much energy.