Concentric versus eccentric training: Effect on muscle strength, regional morphology, and architecture

• DOI: 10.1002/tsm2.197
• Publication Date: 2020-09-27T08:49:51Z
• Authors: Jack Benford; Jonathan Hughes; Mark Waldron; Nicola Theis
• Keywords: Muscle architecture; Morphology; Strength Training

The different architectural adaptations and the regional changes that occur with eccentric (ECC) vs. concentric (CON) muscle actions are not fully understood.The purpose was to investigate in vastus lateralis (VL) after ECC CON training.Sixteen males (23 ± 3 y) performed or twice weekly over 5 weeks, using a single-leg design.Both training modalities caused similar increases knee extensor strength (measured dynamometry) (10-13%) volume (8%) 3D ultrasound) 5-weeks of training.Anatomical cross-sectional area at mid-point greater (9%), but distal end (8%).CON increased fascicle angle (8%), little change (2%).There small increase length (3%).Conversely, variation adaptations.Fascicle both (6%) ends training, were also observed regions (3-4%).Different region-specific evident implications for performance injury risk.