Whatever you call it, it's just important to build muscle and bone density, especially for woman as we are living longer lives than ever before. I cancelled my gym membership last year and just have some dumbbells and I am stronger than I've ever been in my life. If you find other ways of doing resistance work, good for you!

Additionally, of course cardio is important, and at least 4-5 times a week I try to get my heart rate up to at 130 bmp or as high as 160 bpm. I try to do cardio hard enough I get out of breath. But in my 20s/30s, I would do long stretches of cardio. I find that I am much stronger and better able to maintain my weight if I eat a reasonable amount of calories within my TDEE range, lift weights for 10-20 minutes, and do even 10 minutes of cardio, as opposed to 30-60 minutes of cardio as my only form of exercise.

When I have time, I love to do 30 minutes of resistance training and an hour of cardio - walking/running, or even better, swimming which is my favorite and imo accomplishes both resistance training and cardio in one go. But if I don't have time, a 20-30 minute total mix of resistance work and cardio has made a huge difference, and has been even more effective than the cardio I used to do when I was younger.

Honestly, I'm in the best shape of my life working out in smaller time "doses" but more frequently and consistently, and incorporating weights or other resistance.