Here is a workout that I do often with my clients and will sometimes even do myself. This workout is perfect for the days you need to workout yet are short on time.
Complete each exercise for 30 seconds then move immediately onto the next exercise with as little rest as possible between each exercise. For best results count and record your reps as you complete them.
High knees/running in place
Push-up with rotation
Side plank (one side)
Side plank (the other side)
Feel free to modify or swap out exercises for your favorites!
For an added challenge rest for 2-3 minutes then repeat.