Exercise and meditation (staring at wall). Are not mutually exclusive and under most circumstances health/exercise is encouraged to pursue one's specific practice. This concept is not something new or extra ordinary "beyond comprehension".
https://en.wikipedia.org/wiki/Shaolin_Kung_Fu
Certain yogic poses help limber you up for Full lotus posture:
https://www.yogajournal.com/lifestyle/count-yoga-38-ways-yoga-keeps-fit
There's much good in the path your pursuing ie. getting up early, abstaining from alcohol, sugar, etc.. These things just cloud the mind even more. I wish you the best. good luck on your journey.
