The authors note that work was conducted in a laboratory setting and that more research is needed to determine if what they observed in the laboratory also will occur under natural conditions. (sciencedaily.com)
Although this process is well understood in breeding conditions and in the lab, it is still largely unclear how often and how rapidly it takes place under natural conditions. (sciencedaily.com)
There is however little existing data showing the effects of chronic short sleep duration under natural conditions. (ahealthblog.com)