Mexico City, Mexico — A new study says that more than half of Mexican adults don't get regular exercise, a worrisome figure in a country with high rates of obesity and diabetes.

The National Statistics Institute says a survey has found that only 43.6 percent of Mexicans exercise or practice sports regularly, compared to 51.4 percent in the United States and 54 percent in Canada. The main reasons given for not exercising are a lack of time and exhaustion after work.

The study has found that almost two-thirds of Mexicans who don't exercise are women.

Mexico is among the most obese countries in the world. Just under one-third of adults are obese, according to the UN Food and Agriculture Organization.