In my experience this works well to get & stay in great “all around” shape; I have followe

Well SupportedTraining each body part directly once per week leads to better progress than training each muscle group every 2-3 days.

Well SupportedTraining with extreme intensity, rather than high volume, can be advantageous for hypertrophy when time is limited and muscle groups are trained only once per week.

Well SupportedA training schedule of 3 resistance training days and 3 cardio days per week, with one rest day, offers the lowest time commitment for the best all-around results.

Partially SupportedCardio training between resistance training includes one long slow jog, one 30-minute faster run, and one sprints day.