Isaac Hay, from High Wycombe, Buckinghamshire, is taking on the challenge to raise money for Rennie Grove Peace Hospice Care.
The movement coach is set to try 100 different sports in a year.
The charity provides care and support for adults and children with life-limiting illnesses in Buckinghamshire and Hertfordshire.
Mr Hay said: "I’m supporting Rennie Grove Peace Hospice Care as one of my three chosen charities.
"The organisation is close to my heart as its nurses cared for my grandma before she passed.
"My whole family has supported the charity since then, so I’m really pleased to be able to use this challenge to raise funds to support vital hospice care in the local area."
The challenge will see Mr Hay try his hand at a variety of team sports, including baseball, lacrosse, and rugby, as well as individual activities like boxing, ballet, pole vault, and an ultra-marathon.
The challenge will run until September 2025, with Mr Hay set to end the challenge by taking part in an Iron Man event on September 22, 2025.
Mr Hay said: "When thinking of a fundraising challenge I could have chosen one sport and trained really hard in it to do the biggest, hardest, most extreme version of it that I could.
"But that didn’t feel so accessible.
"I want people to see my challenge and think ‘I could do that’ without having a sports background or needing to train for years.
"I want people to see this and think ‘maybe I could give a new sport a go’.
"On top of the fundraising, that would be the best outcome for me."
Mr Hay was inspired to take on the challenge by his work as a movement coach, where he noticed that a big barrier to people getting involved in new sports or physical activity is a lack of confidence or fear of the unknown.
He hopes to encourage others by showing that trying new sports is fun and not scary.
To sponsor Mr Hay, donations can be made online at his Just Giving page.
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