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.
If you buy into the Maggie's Farm approach to "Balanced Fitness for Life", the issue of scheduling comes up (altho not if you do Crossfit, which has a good stew of everything, varying every day, so most Crossfitters go 4-6 days/wk).
Our approach (with expert consultation) is to do your calisthenics classes or calisthenic routines on the day after a weights and powerlifting day. That sort-of counts as an "active recovery" day. If you do a tough calisthenic athletic cross-training hour the day before lifting, most people over 35 will not be at 100% for their weights day.
So that's 4 days right there, assuming you do weight sequences twice weekly. On days before weights, there is no problem with cardio like HIIT or even "long, slow" as a recovery day. (I do "long slow" - elliptical, stairmaster, treadmill - on Sunday mornings before church if there is no big hike planned. Day of rest.) Important to move with intention every day to remain functional.
Every three months it's not a bad idea to take a complete week off from a tough exercise regimen. A week off means away from the gym, and just doing recreational things like hiking, jogging, and swimming. That's a "recovery week." Just bear in mind that, after ten days without hard exercise, fitness measurably declines after age 40.
we are both mid-70's now and fortunate with our health. Somewhat flexible, but wanting to get started in a regime that will only take 3 days a week. What do you suggest? One day cardio--2 weights? What ?