A psychophysical study comparing massage to conditioned pain modulation: A single blind randomized controlled trial in healthy participants.
Study Goal
The researchers aimed to determine whether pain-inducing massage produces similar pain sensitivity reduction as a cold pressor task and if baseline conditioned pain modulation efficiency predicts hypoalgesia from pain-inducing massage.
Results Summary
Pain-inducing massage produced comparable pain sensitivity changes to a cold pressor task, with baseline CPM efficiency influencing outcomes. Both interventions shared similar underlying mechanisms for pain modulation.
Population
60 healthy participants
Effective Dosage
Not specified
Duration
Immediate post-intervention testing (duration not specified)
Interactions
None mentioned
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
pain inducing massage | increase | pain inhibition | - | - | results in greater pain inhibition than | #1 |
pain inducing massage | decrease | pain sensitivity | - | similar magnitude | produces similar magnitude of reduction in pain sensitivity as | #2 |
pain inducing massage | decrease | experimental pain sensitivity | healthy participants | comparable | resulted in comparable experimental pain sensitivity changes as | #3 |
pain intensity during the intervention | neutral | changes in pain sensitivity at a remote site | - | r = 0.20 | demonstrated a weak correlation with | #4 |
pain inducing massage | increase | pressure pain threshold | individuals with an efficient CPM at baseline | greater | displayed greater increases in | #5 |
pain inducing massage | decrease | self-reported pain | - | less | resulted in less self-reported pain than | #6 |
pain inducing massage | no change | CPM response | - | similar magnitude | resulted in similar magnitude of the | #7 |
INTRODUCTION: Pain-inducing massage results in greater pain inhibition than pain free massage, suggesting a mechanism dependent on conditioned pain modulation (CPM). The purpose of this study was to test the hypothesis that pain inducing massage produces similar magnitude of reduction in pain sensitivity as a cold pressor task and that baseline conditioned pain modulation efficiency predicts pain inducing massage related hypoalgesia. METHODS: Sixty healthy participants were randomly assigned to receive either pain inducing massage to the neck, cold pressor task to the hand, or pain free massage to the neck. Participants also underwent pre and immediate post-intervention quantitative sensory testing. A repeated measures ANCOVA determined between group differences in pain sensitivity changes. RESULTS: Pain inducing massage used as a conditioning stimulus resulted in comparable experimental pain sensitivity changes as a cold pressor task (p > 0.05). Pain intensity during the intervention demonstrated a weak correlation (r = 0.20, p = 0.12) with changes in pain sensitivity at a remote site. Individuals with an efficient CPM at baseline who received the pain inducing massage displayed greater increases in pressure pain threshold compared to individuals with a less efficient CPM indicating the potential benefit of treatment stratification by mechanism. CONCLUSION: Although pain inducing massage resulted in less self-reported pain than a cold pressor task, both resulted in similar magnitude of the CPM response, suggesting shared underlying mechanisms. Understanding mechanisms of interventions can move us closer to mechanistic based treatments for pain which is consistent with a personalized medicine approach to care.