Tip: Reverse 21 – Lateral Raise

Start with 7 full reps, then do 7 top-half partials where you only come part of the way down. Finish with 7 bottom-half partials.

To really give your shoulders a beatdown, try doing an isometric hold halfway up after you've completed the last 7 bottom-half partials.

Keep your arms straight or at least almost-straight. This will require using lighter weights, so ditch the ego. Nobody gives a shit how much you can lateral raise anyway.