The most important part of every exercise rep is the one almost everyone rushes through

Eccentric contractions generate greater force per motor unit than concentric contractions, recruit a different distribution of fast-twitch fibres, produce greater mechanical tension on collagen structures within the muscle and tendon, and create a larger anabolic signalling response per unit of effort. The eccentric phase is also where productive micro-damage occurs that drives adaptation.

Practical Application

• Use a 3–4 second eccentric tempo for all resistance training exercises
• Nordic hamstring curls — the most evidence-backed eccentric exercise for hamstring injury prevention
• Slow lowering pull-ups (4–5 seconds) provide superior lat and bicep adaptation
• Romanian deadlifts — the eccentric loading of hamstrings and glutes is where most adaptation occurs
• Do not bounce the bar at the bottom of the lift — it offloads eccentric stress at exactly the wrong moment