Very Hard To Lose Fat in Sports and Fitness Posted February 5, 2013 · Report to Admin Considering changing your workout to running only. It's the single most powerful exercise to loose weight and it worked well for me and my friends. Good luck and think positive! Or cycling - because it's low impact and you'll be able to do more of it. Running is better for losing weight as weight-bearing but easy to get injured. If I were you I'd mix the two.