so I'm a 17 year old girl, trying to get fitter, not because I am particularly fat, bu because I am physically unfit, I lack strength and stamina.
I am fine with leg lifts, other ab exercises and squats. cardio is difficult, but I can deal with it. However I cannot physically hold a plank for more than 5-10 seconds, and even then I struggle, and I cannot do a single press up.
What can I do to build up my arms? I don't want hench arms or anything, just want to be able to hold a plank, since most girls I know can do so on their first try....