Similar to the US group (control), the HPNP and P stunning methods resulted in significantly lower WHC than the LPNP group.
At d 1, the highest peak force value was shown by the LPNP group with no difference (p>0.05) seen between the HPNP, P and US groups.
In this experiment, although the rate of glycogen depletion was not measured, we speculate that the HPNP stunning method could have resulted in a more sudden and rapid rigor development in the affected muscle which in turn, may have caused more rapid biochemical change affecting pH decline and protein degradation, although the observed differences are not large.
In LL muscle, on d 0, the highest and lowest TBARS values were presented by the HPNP and US group, respectively.
In the ST, the highest TBARS values were consistently found in the HPNP group at all ageing times, while LPNP resulted in lower TBARS values at all ageing times.
In the present study, the use of HPNP stunning resulted in a higher level of TBARS (p<0.05) which indicates greater lipid oxidation in both muscles.