So we just got one of these, (Picture) It isn't that exact one but its the same thing. But anyways my mom said that it is better than running, because there is less impact or something. I am just wondering if that is true because I was on there for about 45 minutes and I wasn't even that tired after, And after like 10 minutes of running normally I am breathing really hard and stuff. Please, please, pleaseeeee answer this??