Many people ask themselves how lean should they be. The ideal body fat percentage varies based on gender and on how active you are. For instance, the average body fat for a woman is between 25-31%, while for a man it is between 18-24%. On the other hand, the ideal body fat percentage for a woman who works out is between 24-21%, while for men it should be between 14-17%. To get a clearly defined six pack, a man needs to get to under 10%.
4. Be sure to eat enough protein. As you lower your calorie intake and cut down on processed foods and refined sugar, be sure to get enough protein, Singer says. "Prioritizing protein will help you maintain muscle mass," he says. Lean meats, skinless chicken and turkey, beans and lentils, tofu and soy-based foods, eggs, nuts and low-fat dairy products are good sources of protein. Your body breaks down protein into amino acids, which it uses to build muscle, according to Harvard Health. Research published in 2015 in The American Journal of Clinical Nutrition suggests that for all adults, consuming high-quality protein (from eggs, beef and dairy products, for instance) in combination with physical activity "represents a promising strategy to delay the onset of sarcopenia [a disease characterized by loss of muscle mass and strength]."
This athletic move takes the plank to an all-new level. "It not only improves your core stability, but it targets muscles in your hips, groin, lower back, and often-neglected lower abs," says Durkin. Get your heart pumping by speeding up the movement, or hammer your core muscles by slowing it down. Either way, the exercise will boost your athleticism and will give you something to bare at the beach.
Better news: By doing the types of routines here that strengthen from all angles and focus on function (how your body moves in real life) rather than flexion (crunches), you’ll look good and have a stronger core and less risk of lower back injury. “Not only will you see better gains faster, it’s also the quickest way to take inches off your waistline,” says Fitzgerald.