Place the XLR8 over the area of involvement (AOI). The clinician may choose to (#2) laser over the nerve root (located using the myotome/dermatome chart) or the organ involved (using the Merrick chart).
Frequencies are important but they are not the only thing that creates healing. Always remember that we ALWAYS get the healing benefits of the wavelength (635nm) and the power output (7.5 - 23 mW). These two components are very very research-proven to make ATP, increase circulation, decrease inflammation, increase nitric oxide, IL 6, IL 10, In every condition, symptom, tissue, and mitochondrial cell. The Hz are amplifiers and, in some cases, the entire difference-maker.
Shin splints are inflammation of the tendon sheath........so look at tendon myopathy.
Neurogenic Inflammation is a favorite (9,16,33,36) among the best soft tissue specialists in the world. And "Chronic Pain" 9, 16, 5000, 10000 is a popular setting.
Look at the patient history, tissues involved with "the symptom" and of course ADJUST! (in the case of shin splints very commonly exacerbated due to anterior talus and then other patient-specific subluxation, anatomical short leg patterns, weak and inflexible feet, excessive inflammation EFA ratio, and poor training methods (too much, too often, poor footwear, etc.).