I walk everywhere, from aquatic to terrestrial environments.
That is great for your health I'm sure!  Do you enjoy being out in nature while you are walking?
I do, but it raises different problems than that in water, I get tired very easily!
Well, if you keep at it, you will build up stamina to last longer, right?
You're right, but walking, running, or jumping cause pain in my knees, sadly.
That's no good.  You should go to the doctor and get it looked at.  They may be able to do something to ease or eliminate the pain.
I probably should but I am scared of the use of chemicals that I a doctor might do.
They may be able to prescribe rehab and all natural methods or remedys.  It is worth at least looking into.
of terrestrial locomotion, it is the basic form of locomotion of two major groups with many terrestrial members, the vertebrates and the arthropods. Important aspects of legged locomotion are posture (the way the body is supported by the legs), the number of legs, and the functional structure of the leg and foot. There are also many gaits, ways of moving the legs to locomote, such as walking, running, or jumping.
Legged locomotion Posture.
Appendages can be used for movement in a lot of ways:
I really do love them and care about their well-being, so that when they are running into problems, they will hopefully, at some point, come to me and ask me, 'What is your peace all about? What is your comfort all about? Where do you get your love? Where do you get your talents?' And I can turn to them and say without blinking, 'Jesus Christ.'
In a 2018 interview with Michael Rosenbaum, Levi said, "I'm very spiritual