Stimulation of Peripheral Afferents to Reduce Muscle Inhibition at the Knee

Inclusion Criteria: * \>45 years old * Able to speak and understand English * Unilateral or bilateral knee OA, per NICE criteria * Age 45+ AND * Have activity-related joint pain AND * Have either no morning joint-related stiffness or morning stiffness that lasts no longer than 30 minutes * Score \> 3/20 on WOMAC pain scale * If using pain medications, report \>4 weeks of stable use without recent adjustments Exclusion Criteria: * History of lower extremity surgery. * BMI \> 40kg/m\^2 * Received an intra-articular knee joint injection within the last 3 months. * Currently pregnant. * Currently experiencing heavy menstruation, within one month of an IUD contraceptive device (e.g. coil) being fitted or within 6 weeks after giving birth or at least three months after having a Caesarean. * Suspected or diagnosed heart problems (e.g. arrhythmia, cardiac disturbances). * Use of an implanted electronic device (e.g. a cardiac pacemaker or defibrillator). * Insulin-dependent diabetes. * Implants in the lower limb. * Suspected or diagnosed epilepsy or a familial history of epilepsy. * History of neurologic or psychiatric condition (e.g. Parkinson's disease, bipolar disorder, epilepsy, etc) * Implanted cardiac pacemaker, cochlear implant, medication pump, surgical clips or other metal (dental implants excluded). * Use of alcohol or recreational drugs in the prior 12 hours. * Frequent or severe headaches. * Prior adverse reaction to transcranial magnetic stimulation. * Altered sensation (hypo or hypersensitivity) of the skin of the thigh. * Swollen, infected, inflamed, or damaged skin of the thigh. * Current Use of prescription and over the counter medications will be grounds for exclusion except for: * Contraceptive (birth control) drugs (e.g. those containing ethinyl estradiol and/or norethindrone). * Seasonal allergy medications (e.g. cetirizine (Zyrtec), fexofenadine (Allegra), and loratadine (Claritin)). * Antihypertensives * Statins * GLP-1 agonists * Non-insulin diabetes medications (metformin) * Thyroid medications * Osteoporosis medications * Respiratory medications * Pain medications available over the counter (ibuprofen, acetaminophen, etc)