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Changes in vastus lateralis fibre cross‐sectional area, pennation angle and fascicle length do not predict changes in muscle cross‐sectional area

What is the central question of this study? Do changes in myofibre cross‐sectional area, pennation angle and fascicle length predict vastus lateralis whole‐muscle cross‐sectional area changes following resistance training? What is the main finding and its importance? Changes in vastus lateralis mean myofibre cross‐sectional area, fascicle length and pennation angle following a period of resistance training did not collectively predict changes in whole‐muscle cross‐sectional area. Despite the limited sample size in this study, these data reiterate that it remains difficult to generalize the morphological adaptations that predominantly drive tissue‐level vastus lateralis muscle hypertrophy.