Exploring hamstrings flexion-relaxation phenomenon in experimental low back pain

Does experiential low back pain in normal healthy participants change the hamstring flexion-relaxation response?

Status

Not yet recruiting

Phases

Unknown

Study type

Interventional

Source

ANZCTR

Registry ID

ACTRN12613000752763

Enrollment

Registered

2013-07-05

Start date

2013-07-15

Completion date

2013-07-29

Last updated

2020-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

This study will identify if experimentally induced lumbar erector spinae muscle pain will affect the activity of the hamstring muscles during a standardised trunk flexion task.

Interventions

Two injections of 0.4 ml of hypertonic saline in lumbar erector spinae muscles (3 cm from mid-line) will be injected to induce experimental low back pain; one in the right lumbar ES and the other in left lumbar ES.

Study design

Allocation

Non-randomised trial

Intervention model

Single group

Primary purpose

Diagnosis

Masking

Open (masking not used)

Eligibility

Sex/Gender

All

Age

18 Years to 55 Years

Healthy volunteers

Yes

Inclusion criteria

Age 18-55 years Ability to give written, informed consent

Exclusion criteria

Orthopedic or neurological disorders of low back or thigh Pain on the day of testing Use of pain medication on the day of testing Recent trauma to lower back or leg Unusually elevated hamstring muscle activity which manifests as limited lumbopelvic rotation (assessed on case-by-case basis) Any pain related condition may be grounds for exclusion Score >24 on Pain Catastrophising Scale (PCS) Somatic hypervigilance as indicated by score >7 on Modified Somatic Pain Questionnnaire (MSPQ) Diagnosis of hemophilia or other clotting disorders Allergy to latex products Non New Zealand citizens or residents (due to insurance issues)

Outcome results