Jenn and Kerry, Cornell Wellness Program exercise physiologists, challenge you to try this week's cardiovascular pop-up. This is a high intensity cardiovascular workout that can be done anywhere - no equipment needed. Try these five exercises for 30 seconds each, take a walking break or a marching in place break for up to five minutes. Repeat this cycle 3 to 5 times for a complete high intensity workout totaling 20 minutes or more.