Statistical analysis: For our first aim, changes in outcome measures will be determined by comparing movement outcomes before and after the acquisition and retention phases by two-repeated measures mixed design ANOVA (MANOVA) and comparing raw means (Time 1, Time 2, Time 3, Time 4) and change scores (IP, IL) between groups. The investigators will determine which kinematic measures undergo the most change and thus may be most indicative of motor recovery (e.g., increase in elbow and/or shoulder movement, decrease in trunk movement) by investigating which measures are the most different between training groups. The investigators expect changes in the group training in Environment I to be greater than those in from the group training in Environment 2.