This is an awesome balance and coordination movement that works on sprinting positions, hip stability, and arm coordination! Make sure you're confident with standard SL RDLs before trying this one. - Start in the "A March" or sprinter's position - think big shapes with front thigh roughly parallel to the ground, knee and ankle flexed with toes under the knee, and big running arms to keep you balanced. - Lower quickly into the bottom position of an SL RDL, switching arms as you travel down; end with hips level and back leg extended - Repeat on both sides and notice differences in stability and power!