Effect of Intermittent Hypoxia in Healthy Individuals

Inclusion Criteria: * No history of neurologic injury or progressive neuromuscular disorder * Individuals ages 18-70 years old * Must be medically stable with no history of cardiovascular instability, congestive heart failure or stroke * Not currently (\>2 weeks) on any medications related to spasticity * No history of Sleep apnea * Not a current smoker * Able to comply with protocol/study requirements Exclusion Criteria: * Recent change in the use of narcotic, anti-inflammatory or pain medication * unstable medical conditions or any other clinical observation that may affect the candidate's performance, health, safety or the ability to participate in the study determined by the treating therapist or coordinating staff * Active participation in another movement research study or therapy program * Anti-spasticity drug injection less than 3 months prior to beginning treatment * Musculoskeletal pain that interferes with participation in study * Women who are currently, may be, or planning on becoming pregnant * for fMRI participation, participants will be excluded if they have: * Metal fragments in eyes or face * Implantation of any electronic devices such as (but not limited to) cardiac pacemakers, cardiac defibrillators, cochlea implants, or nerve stimulators * Vascular surgery * Claustrophobia * Body piercing or tattoos