Belly sag isn't something that's super desirable when you're standing upright, but it could be even worse when you're tackling plank position. Heidi Jones, Fortë trainer and founder of SquadWOD, says it happens most often when she's getting tired of holding the exercise. "It's that moment when you have lost your mind in the slow ticking of the seconds that have expired and the knees start to unlock, the belly drops, and instead of feeling the burn in the core, that burn has now moved to the shoulders and upper back," she says.
The good news? It's super simple to fix with some small adjustments. Start by straightening the legs, squeezing the quads and the belly. "It sounds counterintuitive to squeeze the body part that is already 'clenched,' but this will pick your growing baby six-pack off of the floor and align it exactly where it needs to be, which is parallel to the ground," Jones says.
