The objective of this experiment was to determine age-related changes in collagen concentration, sarcomere length, calpain (land m-) and calpastatin activities, postmortem proteolysis and Warner–Bratzler shear force (WBSF) in ovine longissimus thoracis et lumborum. Rambouillet lambs were slaughtered at 2, 4, 6, 8 and 10 months of age and samples of longissimus were collected at 0, 2 and 10 days...