Nearly 75 percent of Americans will be overweight or obese by 2019. That’s the projection of economists in a report, “Obesity and the Economics of Prevention: Fit Not Fat,” issued by the Paris-based 33-member Organisation of Economic Cooperation and Development (OECD). The condition will, they argue, drag down the economy and impoverish us.

Although the prediction seems dire, it’s not set in stone. The New Year gives us yet another chance to get it right — to lose weight and get fit. Here are the latest trends, research and products to help you decide how to eat and exercise to achieve your fitness goals in 2011.

Carole Carson: The Skinny on Fitness Trends in 2011