Why this? 1) You want to strengthen your legs 2) You can have fun exercising with friends and 3) Getting fresh air is oh-so-good for your health. That said, let's head outdoors and make today a 'fit' park date! Our lower body and core workout recommends the use of cones or markers you can use to create a bounding square. If you have enough imagination, you can complete this workout without any equipment!