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The goal of Keys's project, begun during World War II, was to study
Experiment
A controlled procedure carried out to discover, demonstrate, or test a hypothesis, involving manipulation of variables to observe the effect on some phenomena.
Absent From Work
Not present at one's place of employment during scheduled working hours, for reasons such as illness, personal matters, or vacation.
Aerobic Exercise
Physical activity that improves the efficiency of the cardiovascular system in absorbing and transporting oxygen, typically performed at moderate intensity over extended periods.
Diet
The combination of foods and beverages consumed by an individual or group, often considered in the context of nutrition and health.
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