Gyms across the country will be packed this week with people vowing to “get moving” to lose weight this year. Much of the effort will be for naught. And, in fact, some of it could lead to injury and frustration. Currently, Centers for Disease Control and Prevention exercise guidelines call for all individuals to do 150 to 300 minutes of moderate-intensity exercise per week, or 75 minutes of high-intensity exercise per week. In addition, the CDC recommends two days of strength training, or muscle strengthening, for obese people.