I've had two major issues the last 3 years. The first was a problem with pain in the knees. The other is an issue with water in my body, which exercise helps a lot with, but it's hard to walk if your knees are painful.
With the knees I thought at first it was arthritis given my age but began to notice it varied with shoes I wore, and was actually ligaments below the knew that were sore. Not the joint itself. I didn't have much of problem in the alps with my knees and I did a lot of hiking there. But I had some Osolo Italian hiking boots with very hard leather and rubber soles and I haven't found a good replacement yet for them.
Since about 2014 shoe makers have gone to making soles from molded EVA plastic, the kind of foamy stuff you'd see on the bottom of Nikes'. My casual shoes had it, my sandals had it. All my footware except for one pair of dress shoes with leather soles, which made my knees feel good. That was when I noticed it wasn't arthritis bothering my knees, it was the unstable EVA rubber stressing my knee ligaments. Once I proved that stressed out ligaments (from knee wobble) was the issue, I got some recreational shoes with an old "converse style" sole with a hard rubber. I found some Reebok deck shoes with a converse style sole and my knees have not hurt for over 6 weeks. problem solved.
I haven't resolved the water thing, and I have the meds to take if it gets out of hand. The doctors say it's my heart, which pumps fine but seems to have an issue on the relaxation side of the pump. After a check up with a cardiologist, who seemed very knowledgeable, he told me my condition looks like congestive heart failure but my heart actually pumps really well. But when things go bad. with too much water, the heart expands and it cascades into situation that has all the symptoms of congestive heart failure. And they think the reason the water has been staying in my body is because of the heart. Yet I show no sign of kidney disease. They think my heart is just not pushing blood through the kidney's fast enough. I don't I have high blood pressure. Just this dang water issue. And he told me they really don't know what triggers the hospital incidents I experienced the last two years.
I've been thinking about my diet, and what might be different than other people and I think it's the amount of eggs I eat. I love eggs. I love omelettes in every shape and form and a good omelette takes 3 eggs. I often ate them every day. I don't use salt on them usually. Eggs have a lot of albumin in them but apparently that's okay with healthy kidneys. I always try to buy organic eggs, but that's no guarantee the chickens aren't being fed transgenic corn with BT toxin in it or something worse. Inflammation can cause water retention. So I am going on that hunch, and nothing more, I'm cutting my egg consumption way back and see if that makes a difference. I am seeing signs that hunch might be right, but too early to say yet.
The body is very complex array of analog systems, hormones, signaling chemicals and frequencies and all of it is affected by our emotions. The reductionist view of the body doesn't really fix anything, and drugging one system, upsets another, and it gets worse the more meds one is on.