When the patient first gets the personal heart attack detector, they would take an Electrocardiogram (ECG), which records the rhythm and activity of the heart.

BBC: Hand-held heart test devised

"Exercise is known to help with sleep if you don't do it just before bedtime, " possibly because it promotes overall good health and helps enhance the body's circadian rhythm, which promotes activity during the day and resting at night, says Rapoport.

CNN: Exercise plus sleep may lower cancer risk in women