Subluxation of Joint of Lumbar Spine
Conditions
Keywords
spinal manipulation, muscle strength dynamometer, muscle strength
Brief summary
The purpose of this study was to investigate the effects of chiropractic low back adjustments on thigh muscle strength. Force production was measured during different types of muscle contractions with a device called an isokinetic dynamometer. The study included 21 college-aged subjects who did not have any pain and had never received chiropractic treatment with spinal manipulation. During two separate sessions, subjects' thigh muscle forces were recorded while performing maximal muscle contractions on the isokinetic dynamometer. Baseline measurements of muscle force were acquired before either treatment form of spinal manipulation or a sham spinal manipulation, followed by identical muscle force measurements within five and twenty minutes post-treatment.
Detailed description
Spinal manipulation is a therapeutic procedure employed by various healthcare practitioners for alleviating acute and chronic musculoskeletal complaints. This form of treatment is also delivered to enhance the performance and augment the rehabilitation of athletes. However, despite research findings alleging the strength-modulating effects of spinal manipulation alongside numerous professional athletes' positive anecdotal claims concerning its results, the physiological processes to explain its effects remain largely unexplained. Therefore, the purpose of this work was to investigate the effects of spinal manipulation in a college-aged sample population. This study examined the effect of spinal manipulation delivered to the lumbosacral region on concentric force production of the knee extensors and flexors. A randomized, controlled, single-blind repeated measures design was utilized with 21 subjects. Isometric and isokinetic peak torques (Nm) were recorded during two separate session while subjects performed maximal voluntary contractions post-treatment of either spinal manipulation or a sham manipulation.
Interventions
OTHERSpinal Manipulation
Side-posture, high-velocity low-amplitude spinal manipulation targeting the lumbar spine and sacroiliac joints
OTHERSham Manipulation
A simulated lumbar spine manipulation in which no vertebral contact was made
Sponsors
Grant Sanders
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
BASIC_SCIENCE
Masking
SINGLE (Subject)
Eligibility
Sex/Gender
ALL
Age
20 Years to 35 Years
Healthy volunteers
Yes
Inclusion criteria
* Between the ages of 20 to 35 years * Asymptomatic with regard to low back, pelvic or lower extremity pain
Exclusion criteria
* Previously received spinal manipulation from a chiropractor or other health care provider * Contraindications to lumbar spine manipulation (such as fractures, lumbar disc herniation, abdominal aortic aneurysm or cauda equina syndrome)
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Changes in isometric and isokinetic peak torques compared to baseline | Baseline peak torque measurements were acquired before either treatment form of lumbosacral manipulation or sham manipulation, followed by identical peak torque measurements recorded within 5 minutes and at 20 minutes post-treatment | Peak torque measurements were recorded in newton meters (Nm) while subjects performed maximal voluntary contractions of concentric knee extension and flexion during a randomized protocol of isometric and isokinetic contractions, all of which measured with an isokinetic dynamometer |
Outcome results
None listed