The greater the circumference of a muscle, the less mechanically efficient the muscle is … On the other hand, long-distance running can significantly increase MPB and thus hinder muscle growth. Therefore, overtraining will most probably make your muscles grow rapidly and make your legs look bulky. Required fields are marked *. Some people add muscle more readily than others, and running can contribute to this. Increasing the distance can cause a progressive overload of your muscles and their growth, especially if you run at the fast pace and engage the fast twitch muscles. Sprinting engages your muscles more and focuses on muscular power. After I was done at this place I was sent home with stretches and core workouts and told to start gradually running. Yes, I want to receive emails - Rachael Attard's weekly newsletter and special promotions. Running does burn a lot of calories and will help you lose weight all over your body. If you run, you will just contribute to it and perhaps even become too bulky. This means slimmer legs as well! *Amazon and the Amazon logo are trademarks of Amazon.com, Inc., or its affiliates. It's all simple geometry. Learn how your comment data is processed. After struggling for years to find an exercise and diet program that is tailored to women striving for lean and toned body with no bulk she designed her Lean Legs Program. But “significantly bigger” is determined by YOU and what you think is too big; You need to adjust your running (and exercise program) to suit your body type and your goals; and. 05-25-2011, 05:49 PM #6. joyce261. There are 3 different versions fo my program, one for each body type. Those unwilling to run outside should not dismiss the treadmill out of hand. If you want a leaner look, always try to run on a flat surface. Depending on your fitness level, it takes a new runner about 3 to 6 months to prepare for a half marathon and about 6 to 12 months to prepare for a marathon. Following your walk, systematically stretch your body from head to toe using gentle stretches, such as head nods, arm circles, side bends and lunges. If you haven’t done much exercise and have very little muscle in your legs, then you start running, you are going to build muscle and this is going to be a significant difference. The inches on your legs will increase though if you are running 3 miles for one week and then start doing 4 miles the following week, provided you are doing so at a very fast pace and engaging your fast twitch muscles. Losing calories leads to losing the extra weight and your legs are sure to become slimmer as well.