Most metric units are designed around water in some way. Very easy to convert to different units because of this. 1mL of water is equal to 1g of water which is equal to 1 cubic cm of water, for example.
and it takes 1 calorie to heat 1g of water by 1°C, so with your daily recommended food intake of 2000kcal you could heat 2000l of water by 1°C or raise 20l of water from 0°C to 100°C.
Also a normal person can rides the bike between 0W and 100W comfortably, while trained people peak at around 1000W for short sprints.
Most metric units are designed around water in some way. Very easy to convert to different units because of this. 1mL of water is equal to 1g of water which is equal to 1 cubic cm of water, for example.
and it takes 1 calorie to heat 1g of water by 1°C, so with your daily recommended food intake of 2000kcal you could heat 2000l of water by 1°C or raise 20l of water from 0°C to 100°C.
Also a normal person can rides the bike between 0W and 100W comfortably, while trained people peak at around 1000W for short sprints.