Yeah i tried to do all of that in the gym and everything but the only thing that worked was getting out in the heat and trails that helped me. It wasnt easy at first my brother and friend always had to wait for me cause i was either tired or had gotten so exhausted i was puking on the side of the trail(graphic but true). But sticking with it was the best thing i could do, by the end of the summer i was blazing the trails faster than they could so encourage her to hit the trails cause it pays off in the end.