Jump rope is much better exercise for the amount of time you have to do it. 10 minutes of jump rope is equal to running an 8 minute mile.
that said, you will get jumpers knee if you don’t prepare your legs properly. Each day, before you start, you need to do about 10 minutes of squats, leg raises, and other exercises focusing on your knees. Do that for a couple months and your body will adjust to the stress you’re putting on it by jumping every day.
also, don’t try to be a hero out the gate. Start by doing 200 skips a day, let your body adjust, and slowly work your way up to a higher number (I currently do 1200-1600 per day, depending on the day).
If you have a pool near you, go swimming.
If your knee is fukked up, don't do either.
I wouldn't recommend a row machine with knee problem. Heavy bag like you recommende or the elliptical for less impactKnee injury… you can hit the heavy bag or use a row machine. Very effective.
Jogging >
Jump rope is easy to stop any time.
Go outside for a jog and even if you stop you still gotta walk all the way back home. If it's cold your ass ain't stopping unless you want to freeze. Great motivator to keep running
Also wanna cosign biking. Ranks behind swimming but ahead of everything else imo. Better for your joints than jogging and more interesting than skipping, especially once you start exploring your neighborhood or local bike paths.Either way you are introducing some form of impact on your knee which doesn’t seem wise. Biking if you have the range of motion in your knee and walking. Walking with pace is very underrated.