SUMMARY: Intravenous antemortem injections of EDTA, EGTA and CDTA significantly inhibited muscle shortening during development of rigor mortis. Post‐mortem micro‐injections of CaCl 2 increased shortening, but MGCl 2 had no measurable effect. Even though average shear values for muscle from EDTA‐treated rabbits were lower than those of untreated controls, the differences were not statistically significant. However, muscle from EDTA‐treated pigs was significantly more tender than that from untreated controls. The interrelationships between ATP levels and pH values at 0 and 24 hr post‐mortem were investigated and their effects upon muscle shortening and tenderness are considered and explained. A highly significant negative relationship was shown to exist between cooking losses and both initial pH and initial ATP values for both rabbit and pig muscle.
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Weiner et al. (1969) studied this question.
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