Fig. 2From: Muscles adaptation to aging and training: architectural changes – a randomised trialComparison of regression equations obtained from the muscles of the quadriceps in young (grey) and old (black) groups. Values are relative to maximum anatomical cross sectional area (ACSA) and muscle length. A: Vastus Lateralis (VL), B: Vastus Intermedius (VI), C: Vastus Medialis (VM) and D: Rectus Femoris (RF); * Significant difference between young and old (p < 0.05)Back to article page