New research suggests that jumping spiders show signs of sleep cycles, similar to humans and some animals.

‘It tells me how much REM sleep I’ve had, how much deep sleep I’ve had how much I was laying in the bed wide awake,’ said Cameron. Many smart watches and fitness trackers claim to monitor sleeping patterns. “They are about 85 to 95% sensitive when it comes to measuring sleep duration,” said Dr. Tallvajhula. Ad“There are some sleep watches that gauge a drop in oxygen saturation which may be indicative of sleep apnea,” said Dr. Tallvajhula. “I don’t like any of the information that it gives me from my sleep count to my body fat percentage,” said Rahe.

Spending less time in REM sleep is linked to a greater overall risk of death from any cause as well as from cardiovascular disease and other diseases except for cancer, a new study finds. Sleep was measured in an at-home sleep study at the beginning of the study and again over a four day period via a sleep watch. The study also analyzed data on 1,375 men and women who were part of the Wisconsin Sleep Cohort, now in its 22nd year, which measures the impact of sleep disorders, particularity sleep apnea, on health outcomes via a sleep study every four years. "However, in the case of REM sleep, it would be nearly impossible to control an individual's REM sleep unless it was done artificially. Many of the participants were on antidepressants, which he said are known to affect REM sleep.