Background and Purpose: Age may be a moderating factor which influences motor performance and motor learning due to changes in the central nervous system (CNS). Despite the fact that motor performance declines in old age, old adults may be able to learn new motor skills by practice, possibly through physiological and behavioral adaptations. Previous studies have shown that aging does not deteriorate the ability to acquire a new motor skill in expected events, such as visual motor and ballistic tasks. However, there have been no studies investigating whether age influences the ability to learn to respond to unexpected events. Therefore, the purpose of this study was to determine whether age would influence (1) the ability to learn to respond within the transcortical reflex timeframe following unexpected events at different speeds and resistance levels, and (2) the muscle strategy used to respond to unexpected events that occurs before volitional reaction time. Methods: Thirty old and 38 young healthy adults tracked a target set at 3 speeds (Slow, Medium, Fast) and 3 resistance levels (Low, Medium, High) using the left wrist before and after motor training over 1 week (Day1Pre, Day1Post, Day3, Day7). Unexpected stretches were imposed to the wrist extensor muscles by releasing the resistance of the device. Surface EMGs were recorded from the left wrist extensor and flexor muscles. We calculated the error to measure learning. Repeated measures ANOVAs were used to compare differences across time points, groups, and conditions. Results: Although old adults showed poorer motor performance, both old and young adults showed a similar amount of improvement in all 3 speeds and 3 resistance levels over both expected and unexpected conditions in the transcortical reflex timeframe from Day1pre to Day7. No difference was shown between Day1post, Day3 and Day7. In addition, old adults used both feed-forward and feedback muscle strategies to improve their response to unexpected events. Conversely, young adults predominantly use a feed-forward muscle strategy to improve their ability to respond to unexpected events. Conclusion: This study showed clear evidence that despite higher errors in old adults; old adults did not lose the capacity to learn in both expected and unexpected events with all speeds and resistance levels. Clinical Relevance: These findings assist in designing novel rehabilitation interventions for people with aging or neurological diseases.