Humans - Required Rest Time
Relaxation rest time vs. working time and activity.
Required rest or relaxation time related to working time and power expenditure can be estimated as:
tr = tt (qt - qm) / (qt - qr) (1)
where
tr = required relaxation or rest time (minutes)
tt = task or work time (minutes)
qt = task or work power consumption (W, watts)
qm = maximum power consumption level in a day with no recovery requirement (W, watts) (approximately 350 Watts for most male workers, approximately 300 W for most female workers)
qr = resting power consumption (W, watts) (commonly between 70 - 100 W)
Example - Required Relaxation Time
Required rest time for a male worker in very heavy work with task power consumption 600 W, resting powewr 100 W and task time 60 min, can be calculated as
tr = (60 min) ((600 W) - (350 W)) / ((600 W) - (100 W))
= 30 min
Related Topics
-
Physiology
Human physiology vs. air quality, comfort temperatures, activity and metabolic rates. Health effects of gases adn polutions like carbon monoxide and more.
Related Documents
-
Carbon Dioxide Emission from the Human Body vs. Activity
Carbon Dioxide emission from persons vs. activity. -
Clothing, Activity and Human Metabolism
Human metabolism at low and high activity with different levels of clothing. -
Emissions from the Human Body
Gaseous polutants emissions from human bodies. -
Human Body Composition
Composition of the human body. -
Human Effort Levels - Energy and Heart Rates
Human work effort levels vs. energy expenditure and associated heart rates. -
Human Heat Gain
Heat gain from persons in air conditioned spaces - in btu/hr. -
Human Need of Air
Fresh air is required for respiration and for transport of heat and vapor emitted from the human body. -
Met - Human Metabolic Rates
Metabiolic Rate - Met - is used as a measuring unit for human body heat or power production. -
Metabolic Heat Gain from Persons
Human metabolic heat gain in air conditioned rooms. -
Physiology - Activity and Metabolic Rates
Heat production from the human body vs. activity.
