― To maintain proper fitness, it is important to combine proper diet with exercise. Just one or the other alone, will not accomplish most fitness goals. You need to exercise, at least, three times a week. Also, be sure to cut down on foods that are high in sugar, carbs and fat, to maintain heart health. ∙ A really good way to get fit is to start using free weights at the gym. A lot of people are intimidated by free weights and tend to stick to machines. Free weights are better than machines [...].