Cold Shortening

Before rigor is complete, low muscle temperature can trigger calcium-related contraction while ATP remains available. Shortened sarcomeres then produce tough cooked meat.

Risk differs by species, carcass size, muscle, fat cover, chilling rate and electrical stimulation. Beef and lamb are classically more susceptible than pork under typical systems.

Cold shortening is distinct from thaw shortening, freezer damage and ordinary chilling toughness. Diagnosis requires the postmortem time-temperature history.

Tough raw material can remain tough after curing, and contraction can change cutting yield and water behaviour. Ageing may improve tenderness but may not fully reverse severe shortening.

Carcass conditioning, controlled chilling and electrical stimulation are industrial tools. The appropriate system must not compromise microbiological temperature control.

Retain supplier and chilling information where raw-material tenderness matters. Do not assume a curing, marinating or long-ripening process will erase a severe pre-rigor defect.