
Anonymous wrote:Highly doubt you put on muscle while losing weight doing mostly cardio. You may have gained a little in the very beginning as it does take some strenght to run but the only way to really gain muscle is to lift heavy weights and to continually challenge the muscles- lift heavier weights, do more sets or more reps. It is nearly impossible to gain muscle and lose weight/fat at the same time. It is also very likely that by only doing cardio that you actually lost some muscle in the process. In order to gain muscle you need to eat an excess of calories, hence the bulking phase bodybuilders go through. During that time they eat extra calories while lifting heavy weights to gain muscle. When they want to lose fat they add in cardio while still lifting heavy weights. During that time their goal is to maintain the muscle they have while losing fat.
If you are not seeing definition it is likely from losing fat. Everyone has muscles and a six pack- it is usually just hidden under the fat and you need to get to a certain percent body fat to see it.
Obviously the only way to know for sure would be to know your starting and ending body fat percentage as well as starting and ending lean mass.