Sleep has two phases: non-rapid eye movement (NREM) and rapid eye movement (REM). It also has four stages that repeat in 4 to 6 cycles nightly. Each stage affects your body differently, from light ...
Correspondence to Dr Bo Xi, Department of Epidemiology, School of Public Health, Shandong University, Jinan 250100, China; xibo2007{at}126.com Background Evidence on the role of very low or very high ...
1 Human Performance Laboratory, Appalachian State University, North Carolina Research Campus, Kannapolis, North Carolina, USA 2 Department of Biology, Appalachian State University, Boone, North ...
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