The ANCOVA identified a significant difference for the Sahrmanntest score between groups (p = 0.002) (Table 2). Bonferroni testindicated that those who experienced ETAP weekly and yearlyrecorded significantly lower score (p = 0.001 and p = 0.020, respec-tively) than participants who never experience ETAP. Transversusabdominus thickness (as measured by ultrasound) whilst in a res-ting state was significantly different between groups (p = 0.034),with analysis identifying that those experiencing ETAP weekly hadsignificantly smaller TrA thickness than those experiencing ETAPyearly (p = 0.004). Transversus abdominus thickness whilst in acontracted state was not significantly different between groupsand consequently TrA thickness difference between resting andcontracted states were not different between groups (p = 0.798),and the contraction ratios were also not significantly different(p = 0.349).Multivariate Poisson analysis revealed a significant effect ofage and training on the incidence of ETAP, with older adults lesslikely to experience ETAP. Training volume showed a similar pat-tern. Transversus abdominus thickness change with contractiondid not impact on the incidence of ETAP, but those participantswho scored 4.5 or 5 on the Sahrmann test, were more likely to bein the asymptomatic group (IRR = 1.6) (Table 3.). No relationshipsbetween Sahrmann test score and TrA resting thickness or thick-ness change were found (r = 0.070, p = 0.627; r = 0.237, p = 0.097respectively).