Something to take into account for manual labor is a great deal of it happens outside. Due to climate change, many parts of the USA will experience dangerous he

Something to take into account for manual labor is a great deal of it happens outside. Due to climate change, many parts of the USA will experience dangerous heat in the middle of the day, and even some indoor locations like Amazon warehouses have inadequate cooling. https://gizmodo.com/amazons-new-safety-crisis-could-be-heat-waves-1847188930 https://gizmodo.com/amazons-new-safety-crisis-could-be-heat-... If workers took a siesta in the middle of the day, they would avoid the heat to some degree, which would be better for the workers' health and may not greatly change how much work gets done. Workers operating in dangerous heat will either reduce their physical exertions in order to moderate their body temperature, take frequent breaks, or collapse (in which case they are getting no work done, and depending on how badly injured they are, they may need to be replaced, which requires training etc.). In other words, depending on the weather/climate in the future, reducing the work week to 32 hours may not negatively affect results from manual labor either.