GfK asked consumers in 23 countries what activities they regularly engage in to maintain their physical health, and, on a global basis, getting enough sleep topped eating healthy food, exercising, or taking vitamins.   But in the United States, spending time with family, friends, or pets was the most commonly cited health-related activity, reported by seven in 10 (71%) consumers as compared to a global average of 53%. The high proportion in the US was partly driven by women (78%, to 63% for me...