I think you'll have no trouble doing that. Boxing is tiring, and you can add leg weights/body vest weights if you want. If you want to push it, then do burpees between rounds to create your own little puke-filled exercise hell.

But the boxing adjusts to your strength level, so it gets quite challenging the further you go requiring a strategy to manage your stamina, or you flame out swinging hard for a knock-out early on. It's exhausting.