I won’t lie - since having three children, my pelvic floor has never quite been strong enough to withstand extended bouts of jumping, so when I heard about the benefits of the jack plank exercise, it ...

Jakob Roze, CSCS, is a health writer and high-end personal trainer. He is the founder and CEO of RozeFit, a high-end concierge personal training practice and online blog. Side planks trains your ...