The belt stiffens your trunk. The power your legs create can better transfer through your torso into the bar. You can do more reps and lift more weight. Lifting belts don’t make your abs weak. They cue them to contract harder (37, 38). With practice you’ll be able to lift ~10%...
You won’t be winding up your arm for this, so stiffen your shoulder and elbow joints to hinder movement. Use your non-throwing hand to hold the elbow of your throwing arm. You are doing this to prevent it from moving, so cup the front of your elbow tight enough that you will block...