What is the western equivalent to chi?

I think the closest we have in the West would be to talk about spirit or soul.

The Eastern idea of chi doesn’t exactly translate as spirit or soul, but it’s close. I think of chi as life force.

As the Taoist concept of chi crossed over into the West in recent years, a Western word was coined to describe it. Since chi has a number of properties that seem similar to those of electrical energy, it is sometimes called bio-energy.

https://people.howstuffworks.com/taoism-and-chi.htm#:~:text=As%20the%20Taoist%20concept%20of%20chi%20crossed%20over,of%20electrical%20energy%2C%20it%20is%20sometimes%20called%20bio-energy.

There is no such thing.

Energy flow, life force Link

Mojo

I would call it your VO₂ Max.

“VO₂ max is the maximum (max) rate (V) of oxygen (O₂) your body is able to use during exercise.
Oxygen is a critical ingredient in the respiratory process that’s involved in breathing. As you breathe in oxygen, your lungs absorb and turn it into energy called adenosine triphosphate ATP.
ATP powers your cells and helps release the carbon dioxide (CO₂) that’s created during your respiratory process when you exhale.

The greater your VO₂ max, the more oxygen your body can consume, and the more effectively your body can use that oxygen to generate the maximum amount of ATP energy.

Think positive! BE positive!!

The Force