For the PMR training procedures, participants were instructed to assume a comfortable position. All constraining items such as shoes and glasses were removed. Participants were then asked to close their eyes, place their legs comfortably apart, and place their hands away from their bodies with palms facing upward. They were then instructed to listen and follow pre-recorded PMR instructions. The AGR group followed the same procedures, except that they listened to pre-recorded AGR relaxation instructions instead.