What is a good cardio routine?
I want a quick suggestion on how to fit cardio into my routine in a way that I can consistently do without feeling burnt out, while also building cardiovascular endurance.
CONTEXT (just yapping):
I used to have good cardiovascular endurance. I used to play sports and never got worn out in fact, I was one of the fastest students in class. But everything changed after the pandemic. I became lazier, lost interest in sports (soccer and basketball), and got out of shape. One of the biggest things I noticed was that I would run out of gas even just going up the stairs.
Last year, I suddenly got into the gym because my friend influenced and pushed me to go. I usually do an upper/lower split, and I’ve become stronger and more active lately. However, I’ve never really been a fan of cardio anymore. I used to love it because a treadmill was the only equipment I had before the pandemic, and it helped me build the endurance I once had. But now I can’t seem to fit any cardio into my routine either because I’m too exhausted after a session or I’m just lazy and want to go home after lifting.
P.S. The reason I’m asking is because I’ve noticed that my lack of endurance has also started affecting my lifting lately.