"I really need to be better with my sleep," says Collier, who uses a Samsung Galaxy ring to track nighttime stats like restfulness and mental recovery. "I mean, eight hours would obviously be great, but if I get more than six, it's really good."
'Working with professional female athletes for this study not only allowed us to help improve their sleep quality, but it also helped us to identify a new time- and resource-efficient method of sleep enhancement.'