I have to laugh because I have used a version of this technique, with much success, for years while splitting wood with my maul (a heavy duty axe)!
I first exhale fully while I envision my root Chakra extending down into the earth like tree roots. As they get planted, I start to inhale and pull earth energy up thru my root Chakra, filling & passing thru my creative & power Chakras and into my heart Chakra. Then I exhale up thru my throat & 3rd eye Chakras and release it out thru my crown Chakra into the sky.
My next inhale starts by pulling sky energy down thru my crown, 3rd eye & throat Chakras into my heart Chakra and exhaled down thru my lower Chakras and out my root Chakra into the earth.
Once ground-ed and sky-ed I then inhale thru both ends, into my heart Chakra (where both energies mix) as I raise my axe. I exhale thru my swing down and the log is split almost every time. It really is amazingly powerful and effective.
Never told anyone about it before, but I can vouch for my version of this technique. At least for splitting wood anyways. I may try to apply this to other things too now that I think about it. 🤔