The application of P improved tenderness of the ST muscle. The reason
why only the ST muscle was affected by the stunning could be explained
by the differences in metabolic and contractile properties between
both muscles. It is well accepted that the ST muscle is mainly involved
in locomotion and exercise during pre-slaughter handling. Thus, the
response given—by both muscles as a result of different pre-slaughter
and slaughter condition—could also be influenced by their activities.