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Several muscles from mature beef carcasses have been identified as failing to provide adequate tenderness required for a satisfactory consumer eating experience. Postmortem processing strategies can help improve the tenderness and subsequent eating quality of mature beef muscles. The current study was undertaken to investigate the impact of processing strategies (blade tenderization [BT], pretumbling [PT], and moisture enhancement [ME]), alone and in combination, on processing yield and eating quality-related parameters of selected loin and hip muscles (gluteus medius [GM], longissimus lumborum [LL], semimembranosus [SM], and biceps femoris [BF]) from youthful and mature beef cattle. Results indicate that muscles from mature beef were inherently less tender ( P  < 0.05), but some tenderization procedures produced meat that was similar in tenderness to that of youthful cattle. Of the different tenderization strategies evaluated, BT followed by ME (injection of a salt/phosphate solution) was the most effective strategy for improving ( P  < 0.05) tenderness of tougher muscle cuts such as BF and SM. Moisture enhancement alone improved tenderness ( P  < 0.05) and juiciness ( P  < 0.01) of SM, GM and LL, but with the exception of samples tenderized prior to injection, was not effective ( P  > 0.05) in BF muscles. No additional tenderization of GM and LL samples was observed ( P  > 0.05) by combining PT or BT with ME. Combining PT or BT with ME; however, was effective ( P  < 0.05) to control the increased purge loss observed following ME treatment in SM and LL muscles. Pretumbling as a single treatment was ineffective ( P  > 0.05) in all of the muscles, and only treatments that included BT were sufficient to effect an increase ( P  < 0.05) in tenderness of BF.

translational animal science

Effect of postmortem tenderization strategies (pretumbling, blade tenderization, moisture enhancement) on processing yield parameters and eating quality of selected hip and loin muscles from youthful and mature beef carcasses