2.2. Participants
pain
A total of 30 asymptomatic students were randomly assigned to the sham observation (placebo) group (SO, n = 10), MIP group (n = 10), or AOP intervention group (n = 10). The individuals were recruited from the UCH-CEU University in January 2022. The inclusion criteria were the following: (a) age >18 years-old, (b) be a student of the subject “Neuro-Orthopaedic Manual Physiotherapy”, (c) absence of pain at the time of the study, (d) understanding of Spanish language. The reason for not including participants with pain at the time of the study is because it has been shown that the presence of pain alters the ability to imagine, especially when the pain is persistent [