This year, the average age of the competitors were 68, their average fitness age were 43.

今年，参赛选手的平均年龄为68，平均健康年龄为43。

Guests will have to produce at least 10-watt hours of electricity — roughly 15 minutes of cycling for someone of average fitness.

客人将必须产生至少 10 瓦时的电力——大约是中等身材的人骑 15 分钟的自行车。