Wooden breast is a common problem in the poultry industry, occurring when broiler breast meat becomes rubber-like and extremely hard. Unclear points remain regarding the mechanical strength changes caused by post-mortem biochemical changes in wooden breasts. This study aimed to investigate this knowledge gap. We found endogenous protease activity to be high in wooden breasts and observed a 30 kDa fragment of troponin T (an indicator of postmortem tenderness) from day 1 postmortem. The amount of intramuscular connective tissue in wooden breasts was greater than that of normal breast meat, particularly in the perimysium. The intramuscular connective tissue structure and quantity significantly affect the mechanical strength of meat. It became clear that the wooden breasts are much more mechanically stronger than normal breasts at postmortem day 5 because the large amount of intramuscular connective tissue in the wooden breasts has hardly changed even 5 days postmortem.

中文翻译：

---

木箱对鸡肉宰后变化的影响。

木胸肉是家禽业中的常见问题，当肉鸡胸肉变成橡胶状且非常坚硬时，就会发生这种情况。关于木制乳房验尸后生化变化引起的机械强度变化尚不明确。这项研究旨在调查这种知识差距。我们发现木质乳房中的内源蛋白酶活性很高，并且从死后第1天开始观察到30 kDa的肌钙蛋白T片段（死后压痛的指标）。木制乳房中的肌内结缔组织数量要多于正常乳房肉，尤其是在肌膜上。肌内结缔组织的结构和数量显着影响肉的机械强度。