Path of the Olympian

Since time immemorial, civilizations of every shape and size have held athletes in high esteem.  The masses have particularly venerated individuals who could perform feats of strength that far surpassed the capabilities of the mundane.  Barbarians that follow the path of the Olympian have learned to channel their rage into spectacular athletic accomplishments.

Superior Athleticism

Starting when you choose this path at 3rd level, you gain proficiency in the athletics skill.  If you are already proficient, you instead gain expertise.  Furthermore, any Athletics skill check you make, you can treat a d20 roll of 9 or lower as a 10.

Mind over Matter

Beginning at 6th level, You have advantage to checks against being charmed or frightened while raging.  In Addition, while raging, you are resistant to psychic damage.

Olympic Presence

Your Athletic prowess is both inspiring, and intimidating to those around you.  Beginning at 10th level, allies who can see you gain advantage on Strength (Athletics) checks. In addition, enemies that can see you have disadvantage on Strength (Athletics) checks. 

Force of Will

Starting at 14th level, When you fail a Strength Saving Throw, you can use your reaction to succeed on it instead, showcasing your sheer force of will and determination.  Once you have used this feature, it may not be used again until you have completed a long rest.