Effects of ultrasound (HIU) time, post-mortem time and HIU time*post-mortem time applied before (a,b,c) or after (d,e,f) freezing on the water holding capacity (WHC) of rabbit meat. HIU was applied only at 36 h post-mortem (before freezing) or 156 h post-mortem (after freezing). a,b,c,d,e Different letters in the columns within the same graph indicate significant differences between treatments (p < 0.05).