I'm a certified coach — it's not sit-ups I'd recommend to strengthen your abs without back pain, try the runner's plank instead

The runner's plank is an alternative I use as a certified trainer when sit-ups aren't possible, and this is exactly how to do ...
AOL

The Surprising Truth About How Long You Should Hold a Plank.

YOU KNOW THE SAYING: Work smarter, not harder. You may have already incorporated that mentality into your training routine, subbing unfocused, 60-minute workouts for strategic 30-minute sessions, or ...

Over 50? If You Can Hold a Side Plank for This Long, Your Core Is Ahead of Most

Test your core after 50 with the side plank. See time standards, proper form, and progressions to build stability and balance ...
Fox Business

AEW stars Adam Copeland, Jay Reso open up about new Pure Plank idea, board's success

All Elite Wrestling (AEW) stars Adam Copeland and Jay Reso took on a new challenge when they dove headfirst into the fitness industry with their idea for a planking board called Pure Plank. The pro ...