Prepare To Perform

TL;DR Zone 2 exercise — easy cycling, swimming, or aqua jogging at 60–70% of your heart rate reserve — does more than maintain fitness during Achilles rehab. It reduces cortisol, supports parasympathetic tone, and creates a better cellular environment for tendon healing. It doesn't replace structured loading. It makes the loading work better. Most pre-workout advice points in one direction: caffeine improves performance, so take it before you train. For high-intensity session