We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
A good test of general fitness is to find out how long you can do jumping jacks or jump rope. These old-time calisthenics are time-tested cardio/calisthenic exertions, with no equipment needed (a good rope is good, though).
Like everything in the cardio/calisthenic area, these are not strength-builders. Done right, they have close to zero joint impact. They are endurance exercises, and endurance exercises belong in everybody's routine if they want a vigorous life. I see women and men jump-roping for 15 minutes. I cannot do that. After three minutes of either of those exercises, my form falls apart and I become short of breath, probably from not getting good breathing rhythms.
Anything that gets your full body moving and your heart rate up has got to be beneficial, right? Especially now that options are relatively limited.
I don't have knee issues thankfully, but I wonder if others that can't run get knee pain from doing JJ's? Of course its easier to find a softer spot like grass (or indoor carpet) than it is to find a softer surface to run on.
Jump rope... some of the best cardio you're probably not doing. That was the title of an article I read short after aortic valve replacement. Good cardio, considered weight bearing exercise so builds bone density and encourages good form. Decided to incorporate it into my workout regimen, thought how hard could it be? Easy enough when I was a kid. First time I was out of breath in under a minute. Worked my way up to five minutes, fifteen minutes, then decided I would set the timer for 30 minutes and jump rope till the timer expired. Many minutes spent catching my breath in those 30 minutes until the timer expired but got to a point where I could jump consistently the entire 30 minutes. Now I jump for 45 minutes once a week, try for two days HIIT cycling a week and three days endurance or recovery rides a week.
I always saw jumping jacks as similar to running/jogging. Got the heart pumping. Never though of it as a long-term 'exercise' for anything.
I am a slow-and-plodding type. I am not good at 'speed' sports. I like walking for long periods, hiking, and, for a time, I really liked to swim when I had easy access to an Olympic sized pool. But it was about how long I did the exercise, not the speed with which I did it.