fitness and endurance. But to kickstart a sluggish metabolism, you need intensity. Karp suggests interval training (condensed runs that combine intense efforts with recovery) because studies have found these workouts burn more calories during and after
. But that doesn’t mean staying slim is a battle you can’t win. It’s possible to outsmart your genes and maintain a healthy weight.Case in point: a 2009 Finnish study published in the International Journal of Obesity tracked 16 same-sex twin pairs (chosen because
