What’s more difficult than a TRX Side Plank? A single leg TRX Side Plank A plank works more than your obliques but your shoulder and glutes as well. The shoulder being the base and providing stablility while your glutes contract to make sure your hips are not dropping and your spine is not hyperextended, alleviating pressure in that area. 🎥: coach_ambertobin #TRXPlank #Corestrength #Abworkout #obliques