N/A
Completed N=44
Cranial Laser Reflex Technique for Hamstring Function
Hamstring injury · Muscle Tone Increased · Muscle Pain · Muscle Weakness
Source: ClinicalTrials.gov NCT03044106 ↗
Enrolled (actual)
44
Serious AEs
0.0%
Results posted
Jan 2019
Primary outcomePrimary: 90-90 Knee Extension Angle Test — 167.3; 166.4; 168.5; 168.8 degrees
Summary
Purpose: To conduct a pilot study of the effect of Cranial Laser Reflex Technique (CLRT) compared with sham laser on hamstring muscle flexibility, strength, and pain pressure threshold.
Participants: Active, young adults ages 18 to 35.
Procedures: A two-visit, assessor and participant-blinded crossover study with 1-week washout. Subjects will complete three functional hamstring tests before and after CLRT and sham laser treatment. Subjects will also complete questionnaires to assess their expectations and perceptions of the interventions.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY 90-90 Knee Extension Angle Test |
167.3; 166.4; 168.5; 168.8 | — |
| SECONDARY Handheld Dynamometry |
17.2; 17.4; 16.9; 17.0 | — |
| SECONDARY Pain Pressure Threshold |
10.6; 11.0; 11.3; 11.5 | — |
| SECONDARY Mean Difference Pre/Post KEA, Stratified by History of Prior Hamstring Strain |
167.825; 168.4875; 167.1778; 165.9235; 171.65; 169.4875 | 0.0068 sig |
Eligibility Criteria
Inclusion Criteria
- Between 18-35 years of age
- All genders
- Willing to complete two study visits over 2-3 weeks
- Able to read and communicate in English
Exclusion Criteria
- Current lower back condition with pain, numbness or tingling that radiates down the legs
- Active treatment for a major medical illness, such as heart disease, uncontrolled diabetes or hypertension, malignancy, autoimmune, or immune deficiency disorder
- History of vasculitis, intracranial mass, clotting disorder (including medication-induced, e.g., warfarin)
- Current skin malignancy on scalp
- Cognitive dysfunction preventing informed consent
- Pending or currently receiving benefits from personal injury litigation, including worker's compensation
- Chronic long-term disability related to lumbosacral injury/symptoms
- Epilepsy
Data sourced from ClinicalTrials.gov (NCT03044106). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.