mitochondrial density. increase it.
heal your gut, eat food that contain manganese. probiotics need manganese, otherwise they go extinct.
bad bacteria can survive acidity by being able to use iron instead of manganese as the component around the superoxide dismutase.
try a diet over a couple of week so that you lactoferment oats (oat bran is better). lactofermenting is not really about milk, it's about the lactobacillus species that you can find in probiotics that need to incubate. swallowed pills are of little efficiency. grow the culture by using prebiotics - that is food in which probiotics thrive.
a spoon of coconut oil (it makes yeasts/fungus more vulnerable to lactic acid etc.), 400g oat bran, up to 100g ground flaxseed, sesame, buckwheat (the least). use green tea brewed at ~70C initially and let it sit for up to 30 minutes so that it cools. mix it all up with the starting culture at no more than 37C and let it sit for a minimum of 12h in some glassware with no light. avoid regular plastics. serve with honey in the morning. it's the best thing i could recommend as being not very hard to prepare, affordable and being rich in the essential nutrients. in the evening... pressure cooker boiled sweet potatoes with some olive oil, curry/turmeric and garlic/onions.
try this for several weeks and see how much better you feel throughout the day. it also makes you smarter...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3211030/
...and use clipless pedals and narrow q factor cranks with not so low cadence and a narrow, long and rather flat seat that is pointing downwards.