Olympic Athlete

You were always very dexterous and had a love for being outdoors and exercising you never were the smart type and spent most of your time training until you eventually needed it.

Ultimate Olympian

At 17th level you finally become what you desired, after all those years of training you gain the ability to add 5ft of movement per charisma modifier once per long rest. You can split these ft of movement, you may also put those feet of movement into climbing, swimming or walking. Along with this you gain the ability of 10ft of flying speed if you get a 10 ft running headstart.

Bonus Proficiencies

When you choose this archetype at 3rd level, you gain a proficiency in the athletics skill and acrobatics skill and an additional 2 to your Dexterity modifier with a max of 20.

Multitude of Events

Starting at 3rd level, as you begin your training into athleticism you gain permanent 10 ft of speed in walking and swimming and 5 ft of climbing as well as an advantage toward skill checks involving dexterity.

 

Extreme training

At 9th level, you become adapted to the elements from your extreme training regime and gain an additional permanent walking speed of 5, and a swimming and climbing speed of 10. As well when you are attacking a enemy while you are in water you gain advantage to all melee attacks, and advantage to all saving throws when climbing. 

The student becomes the Master

At 13th level you learn the inner-workings of being a teacher, so you can once per long rest spend 5 minutes training one person of your choice. The person you trained gets 10 feet of swimming, climbing and walking speed until their next long rest.