TECHNIQUE: Sit on Step 360 with knees partially bent, hands on temples with elbows bent. Maintain core engagement, and bring opposing knee and elbow towards each other. ADVANTAGES: Greater core engagement and stabilization demands over regular Knees to Elbows. Exercise tubing increases resistance. FAULTS: Not maintaining or core engagement; pelvis tucking under resulting in rounded back, over rotating/under rotating. SCALING: Remove tubing to decrease workload; perform Knees to Elbows on the floor if core engagement and stability demands are too great. ONLINE TRAINING: www.sandandsteelfitness.com/online-training EXERCISE DATABASE: www.sandandsteelfitness.com/exercise-database PERSONAL TRAINING www.sandandsteelfitness.com/personal-training