You should read Alex Hutchinson. He has two great books backed up by science and studies that will show you why your thinking is wrong. https://www.amazon.com/

You should read Alex Hutchinson. He has two great books backed up by science and studies that will show you why your thinking is wrong. https://www.amazon.com/Which-Comes-First-Cardio-Weights/dp/B0182Q7KHE/ref=sr_1_3?dchild=1&keywords=cardio+or+weights&qid=1625529378&sr=8-3 https://www.amazon.com/Which-Comes-First-Cardio-Weights/dp/B... https://www.amazon.com/Endure-Curiously-Elastic-Limits-Performance/dp/006249998X/ref=pd_sbs_2/138-1677590-4541050?pd_rd_w=0b2DG&pf_rd_p=a5925d26-9630-40f3-a011-d858608ac88b&pf_rd_r=KE2V8H265WARRJ1B6Q8R&pd_rd_r=704276cb-0ae6-4fca-838d-7f62f1b1d381&pd_rd_wg=30t71&pd_rd_i=006249998X&psc=1 https://www.amazon.com/Endure-Curiously-Elastic-Limits-Perfo... It's all in your head. Your brain is controlling your endurance not your genetics, what you need to do is train your brain like a professional athlete does to increase performance. Read the books , it will educate you in all things exercise and performance.