Influence of Expectations on Change in Pain Perception After a 3 Min Wallsquat Exercise.

Summary

The purpose of this study is to investigate how expectations induced by information given prior to exercise influence the magnitude of exercise-induced hypoalgesia after a 3 min wallsquat exercise in healthy subjects. The study is a double blinded (participant, investigator) randomized controlled trial The results from the study may be of great importance to the understanding of exercise-induced hypoalgesia, and whether the information related to exercise as pain relief can be used in practice for patients with pain.

The subjects are randomized to 1 in 3 groups. Hypoalgesia expectation, hyperalgesia expectation, neutral expectation. Each group (besides the neutral group) is given different information of what to expect on pain ratings after a 3 minutes wallsquat.

Conditions

• Pain
• Physical Activity

Interventions

OTHER

Hypoalgesia expectation

"Before and after the squat exercise, assessment of how you experience pressure pain with the 2 devices you have just become acquainted with will be repeated. While doing the squat exercise you will be asked to indicate pain in the thigh muscles. What we currently know about the effect of exercise on the experience of pressure pain is that after eg. cycling or walking, more pressure can be applied before the pressure starts to hurt and more pressure is required before you can't withstand anymore. Whether this applies to a squat exercise, as the one you are about to perform, has not yet been investigated, but we expect that the same applies here, namely, that more pressure is required before you feel the pressure begins to hurt you and you will be able to endure a greater pressure." Supported by visual information.

OTHER

Hyperalgesia expectation

"Before and after the squat exercise, assessment of how you experience pressure pain with the 2 devices you have just become acquainted with will be repeated. While doing the squat exercise you will be asked to indicate pain in the thigh muscles. What we currently know is that exercise can cause muscle pain, both during and after training. You may have experienced muscle soreness yourself in relation to training? We expect that the same will apply here. Namely, after performing this squat exercise, which will likely hurt your thigh muscles while doing it, you will experience that the pressure applied afterwards, with the two devices you have just become acquainted with, should be less before it starts to hurt and that you can endure less pressure." Supported by visual information.

OTHER

Neutral

"Soon you are going to do a training exercise in a squat position up against the wall for 3 min. Following the squat exercise, we will repeat the measurement of how you experience pressure pain with the 2 devices you have just become acquainted with. While doing the squat exercise you will be asked to indicate pain in the thigh muscles."

Sponsors & Collaborators

• University of Southern Denmark

  collaborator OTHER

• Odense University Hospital

  lead OTHER

Principal Investigators

• Gitte Handberg, MD · Pain Center, OUH

Study Design

Allocation

RANDOMIZED

Purpose

OTHER

Masking

DOUBLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

50 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2018-09-19

Primary Completion

2018-11-22

Completion

2018-11-22

Countries

• Denmark

Study Locations