Monday in the 4HL

The 4HL is also a market. The health and fitness industry has to market its services and products to people who only have a certain amount of free time. That means heavy emphasis on diets. Or supplements. Most people have control over this

If you say the appropriate amount of exercise is 2-3 hours a day of movement People don't have that time. So you get an entire industry catering to half an hour or maybe an hour exercise routines per day