Rope skipping…engages legs, calves, hamstrings, glutes, core, back, chest, shoulders, arms…total body.
If you cannot do 30 straight minutes of skipping then do intervals. Intervals are better then steady pace cardio because your heart rate goes up and down and you can give yourself a short break to recover.
Here’s some variations of interval skipping
60:30 for 30 min
90:30 for 30 min
2 min:30 sec for 30 min
30:10 x8 (around 5 min)
20:10 x8 for tabata style
Here’s a video on different variations:
Check out his channel for some simple yet pretty hard workouts