That's awesome. I have no doubt it made you athletic. It's an activity that's relatively high intensity and requires sustained coordination.If you want to see what can be done with jump rope check out Olympic wrestler Buddy Lee on youtube.
My kids laugh when I told them I kept a jump rope journal of every jump the summer going into 7th grade. Just an old 1/2” hunk of rope with knots on the end. It helped get me from being the non athletic last pick at kickball kid, into 5 HS sports and away from a couple friends starting the weed.
54 now and have a couple ropes that mostly gather dust. Rouge speed rope works great for a few double unders.