After resting for an hour, you will feel much better.

Explanation

- "After resting for an hour" is a gerund phrase, consisting of the verb form "resting" (ending in "-ing") and its modifier "for an hour".- The gerund phrase functions as a noun, serving as the object of the preposition "After" and indicating the action that precedes the main action "you will feel much better".- Gerund phrases often function as nouns, and in this case, "After resting for an hour" is the thing that happens before the main action.