Today's workout consists of the tabata method, and will knock out those problems areas, and count as a little cardio. So set your timers, and push through this one. It's tough, but it's over with in only 12 minutes if you push through it.
Oh and last but not least, here's the cute little graphic. If you like this workout, feel free to pin it!
Some advice: During squats, you know your limits and what is safe for your knees, so you know how low you can go. Use your glutes, it takes stress off your knees. You should be squeezing your glutes during bridges also. During jump rope, keep your knees slightly bent, and really pull your lower abs in during reverse crunches, and dolphin planks.
Enjoy this one, it's tough!
Disclaimer: Although I'm a fitness professional, not all workouts are suitable for everyone. Please consult your doctor before beginning any exercise/fitness regimen.