Come to a position where your upper body is almost parallel with the floor, then perform the bent - over row, pulling to the bottom rib with elbows squeezing in. (womenshealthandfitness.com.au)
And your core muscles are being utilized in order to keep your body parallel with the floor. (ashotofadrenaline.net)
While hanging, lift your legs up until they become parallel with the floor, keeping the knees extended. (fitnessandpower.com)