Eccentric contractionStrength & Power

A muscle producing force while it lengthens — like lowering a weight.

An eccentric contraction is when a muscle produces force while lengthening, such as lowering a dumbbell or the braking phase of landing. Eccentric training can build strength and tendon capacity effectively and is a mainstay of tendinopathy rehab, but it also causes more muscle damage and soreness than other contraction types. It contrasts with concentric (shortening) and isometric (static) contractions.

• Hamstring fascicle behavior during leg curl exercises performed at varying knee joint angles and loading intensities in individuals with a history of unilateral hamstring injury: a randomized cross-over design study · issue 002
• Previous Hamstring Injury Does Not Impact Biceps Femoris Long Head Fascicle Length and Eccentric Knee Flexion Strength Changes Following a Low-Volume Resistance Training Intervention in Elite Under-20-Year-Old Male Gaelic Footballers · issue 002