Box and whisker plots of MRI T2 in upper and lower extremity muscles in different age groups. Whisker bars represent 5th and 95th percentiles and dots are shown for outliers. AF = anterior forearm, BB = biceps brachii, BFLH = biceps femoris long head, Del = deltoid, Gra = gracilis, MG = medial gastrocnemius, Per = peroneals, PF = posterior forearm, Sol = soleus, TA = tibialis anterior, TB = triceps brachii, TP = tibialis posterior, VL = vastus lateralis.