You can reset a range selection or a clip to play back at normal (100 percent) speed at any time. Resetting the speed removes any directional effects and Holds applied to the selection at the same time.
Reset a range or a clip to play forward at 100 percent
In the Timeline, select a range, a whole clip, or a group of clips that you want to reset to their original speed.
Choose Normal 100% from the Retime pop-up menu in the toolbar (or press Shift-N).