Is my endurance improving from jump roping?

canaan90

I've been jump roping between 3-5 days, and usually the worst I do now is 7-8 minutes, and that's mostly just from tripping on the rope, which frustrates. But it doesn't occur that much now. I'm usually able to get at least 10 minutes of non-stop jump roping now, for the most part, although as I just stated, once in a while I screw up. On most of my good days, I've been getting at least between 12-16 minutes of non-stop jump roping. And I try to keep a good pace. During the round, I'll speed it up and then slow down. And I usually have to push myself that far. So does this mean I'm getting more in shape, and I have better endurance now? Or does it just mean I've only really improved my coordination and technique but not really my stamina?