I am curious if there are beneficial techniques and/or mantras that help in the practice of harnessing prana while physically performing activities ranging from simply walking in nature to more intense activities such as playing soccer. I understand that the primary focus of pranayama is to keep the body relaxed and still whether it be standing or sitting, which I am currently practicing daily. However, I'm curious how one can benefit on time spent physically engaged with prana. Even though I find great benefit in the internal pranayama practice of inward serenity and stillness, I'm still seeking productive ways to utilize my time spent doing physical activities. Is this considered risky and harmful? I'm not sure if I fully understand what you mean by split consciousness. Could you elaborate? Thank you

If you want to do something beneficial during physical activities, focus completely on the activity. No thoughts, no distractions, become the activity, nothing else. This is beneficial for your consciousness because you strengthen it with your focus, instead of splitting it by having thoughts, fantasizing about random things, making unconscious movements, like leg shaking, etc. Every subconscious activity that you prevent will save energy that you can utilize for your consciousness and the practices where you use it.

But this does not equal to harvesting this energy. For this you either need to perform practices like Pranayama or Sexual Magic with a spouse. There are also practices like Tai Chi and they help because they are also for harvesting Prana. But physical activities like soccer will only push that Prana into your muscles, not into your consciousness.

If a couple in their 30's is only in their first year of practicing transmutation through Pranayama and Sexual Magic and that couple also has a strong longing to create a family before they get too old to have children, is it wrong for the husband to voluntarily spill his cup with pure intentions of love and sacrifice for the sake of the family, while the wife remains in chastity? What the Yellow Book states about creating children of wisdom, seems to be an extremely rare achievement for only those that have reached a high level of spiritual development requiring a significant and uncertain amount of time, which from a biological standpoint is limited especially in regard to a couple in their 30's only at the beginning stages of performing transmutation.

I am sincerely and humbly grateful for you sacrificing your time to answer my questions.
Peace be with you.