1. 
Declining athletic ability can be the result of what ? – Brainly.com
brainly.com/question/12400566
2. 
Declining athletic ability can be the result of what? – Brainly.in
brainly.in/question/29306883
3.
Do genetics influence athletic ability? | BBC Earth
www.bbcearth.com/news/do-genetics-influence-athletic-ability
4.
Карточки Quizzes Wrapped up for section 4 | Quizlet
quizlet.com/513653024/quizzes-wrapped-up-for-section-4-flash-cards/
5.
At what age did you notice a decline in athleticism? : Basketball
www.reddit.com/r/Basketball/comments/bfavz7/at_what_age_did_you_notice_a_decline_in/
6.
CAE Word Formation Practice Test
www.flo-joe.co.uk/cae/students/tests/CAE-Part-3-Word-Formation-Practice-Test.htm
7.
Part 3 – Use of English – C1 Advanced (CAE) | practice tests, exercises…
app.engxam.com/cae/use-of-english/3/
8.
The Important Role of Athletics in Schools
www.thoughtco.com/important-role-of-athletics-in-schools-3194429
9.
Sport of athletics – Wikipedia
en.wikipedia.org/wiki/Sport_of_athletics
10.
Genome | Genetic Testing for Athletic Ability
www.genomemag.com/genetic-testing-for-athletic-ability/
11.
Mental Health of Elite Athletes – Physiopedia
www.physio-pedia.com/Mental_Health_of_Elite_Athletes
Conclusion
Guide above should be useful for Declining Athletic Ability Can Be The Result Of What.