Our results showed that both HAA and LAA were mainly influ-enced by time (P < 0.0001). The treatments and their interaction didnot show any significant effect (P > 0.05) on antioxidant activity.No significant difference (P > 0.05) in HAA was observed for pres-sure and low temperature treatments at the end of treatment (day4). HAA generally did not significantly increase (P > 0.05) until 10days of ripening. No significant difference (P > 0.05) in HAA obtainedfrom ORAC and TEAC assays was observed among the hyperbarictreatments. However, the ORAC results indicate that hyperbarictreatment at 0.9 MPa caused a significantly higher increase in HAA(P < 0.05) than the 13◦C at the end of ripening (day 14).