Signalment of all horses participating in each section of the study, showing no significant differences between matched groups.

<p>Signalment of all horses participating in each section of the study, showing no significant differences between matched groups.</p

Muscle fibre type distributions.

<p>Boxplots illustrating the muscle fibre type composition of horses homozygous (HH) (n = 4), heterozygous (HR) (n = 8) and control horses (RR) (n = 6). * Denotes significant differences between individual groups (p<0.05) following post- hoc analysis.</p

Pre- and post exercise muscle enzyme activites.

<p>Graph illustrating the pre and post exercise (a) CK activity and (b) AST activity for each GYS1 genotype (n = 4) (HH = homozygotes, HR = heterozygote, RR = control).</p

Resting muscle enzyme activities.

<p>Box plots illustrating the resting (a) CK activity and (b) AST activity for each GYS1 genotype (n = 8) (HH = homozygotes, HR = heterozygote, RR = control) * Denotes significant differences between individual groups (p<0.05) following post- hoc analysis.</p