Don't get too cute with your lifting tempos.⠀⠀ ⠀⠀ Just do an explosive concentric, where you're exerting as much force as possible.⠀⠀ ⠀⠀ And a controlled eccentric, where you lower the weight over 2-3 seconds to avoid losing your form.⠀⠀ ⠀⠀ Trying to intentionally slow down either part of the rep would give you zero extra growth, and would actually have the opposite effect.⠀⠀ ⠀⠀ Slow down the concentric?⠀⠀ ⠀⠀ Your body will preferentially use the slow twitch fibers and neglect the fast twitch on

Concentration Curl | Form Check

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Eccentric Exercise Can Build Strength in Less Time and Prep Your Body for Better Performance

Eccentric vs. Concentric Movement

Shoulder Eccentric Exercises - Posterior Rotator Cuff