Source: Player's Handbook

You have undergone extensive physical training to gain the following benefits:

  • Increase your Strength or Dexterity score by 1, to a maximum of 20.
  • When you are prone, standing up uses only 5 feet of your movement.
  • Climbing doesn’t cost you extra movement.
  • You can make a running long jump or a running high jump after moving only 5 feet on foot, rather than 10 feet.