Table 2 Vastus lateralis fibre typing in healthy age-matched controls
ReferenceN (M/F)Age (years)Type I (%)Type IIA (%)Type IIX (%)Fibre typing
299 (9/0)65 (5)58 (16)32 (13)†5 (5)HC‡
2710 (10/0)61 (6)41 (9)39 (9)20 (9)SDS PAGE
1015 (13/2)64 (3)43 (13)29 (12)27 (12)HC
247 (7/0)63 (9)62 (2)28 (5)10 (8)IHC
2318 (15/3)65 (4)58 (12)*29 (12)*8 (8)*HC‡
2110 (10/0)61 (6)54 (13)28 (16)†8 (6)HC‡
229 (9/0)63 (5)39 (11)*8 (4)*HC
146 (?/?)65 (11)50 (14)*36 (21)*16 (10)*HC
  • N, study group size; HC, histochemistry; IHC, immunohistochemistry; SDS PAGE, gel electrophoresis analysis of myosin heavy chain isoforms; ? indicates that the data were not given.

  • *Not all subjects had a muscle biopsy.

  • †Determined in a figure.

  • ‡Sum of fibre type proportions is not 100% because (small) proportions of hybrid fibres were excluded from the analysis.