How can you do aerobic excercise (run, jumprope ect.) and keep muscle mass/"shape"

[fluffylocks]

Im 135 pounds, 38-26-40. I really love my shape, but i want to start running 3x a week because for me running relives alot of stress, to be healthier, blood circulation ect.

In the past, i've just been keeping my calories a certain level so that i wouldnt gain or loose weight, and doing toning excercises like pushups, situps, squats and lunges.

If i start running for health, but up my calories so that i dont loose any weight.....Will loose the muscle in my legs, thighs, hips and butt?

Is there anyway to keep your shape, but still do aerobic excercise?

Would jumproping or skating be better?

Im trying to build an excercise regimen that i can stick with for life, but i really like my "curvy" shape.

[cheetarah1980]

For me personally, running added muscle to my legs and glutes. If you're planning to run outside, you're probably going to hit some hills. Hill running is just as good as lifting for strengthening the legs. I can't say for sure, cause everyone is different, but you probably won't lose muscle mass (at least not in your lower body) from running.

[Joyful1]

For me personally, running added muscle to my legs and glutes. If you're planning to run outside, you're probably going to hit some hills. Hill running is just as good as lifting for strengthening the legs. I can't say for sure, cause everyone is different, but you probably won't lose muscle mass (at least not in your lower body) from running.

ITA :yep: It just added great definition to my legs.

[winterinatl]

I have heard and read from bodybuilders (who want to keep every ounce of muscle) that running "skinnies" the legs. If you want to run, they suggest not running long distances at unvaried paces (picture the Kenyans). Run in sprints, and run up hills (picture Marian Jones...) that will keep your tail curvy! Oh, and walking fast on treadmill does a great job, too.