This theory suggests that the ground pulsates with positive and negative electrical energy charges that are picked up by positive and negative receptors on the feet. The energy receptors in the feet are a part of the nervous system. In the healthy person, the charges and energy from the earth pass freely into the nervous system.
If the positive and negative charges in the feet are not in contact with the earth, due to congestion in the feet or particles impeding passage, they cannot pick up the earth charges as effectively and energy flow is impeded.
Reflexology can unblock the pathways allowing the electrical terminals in the feet to touch the ground again so that energy can flow freely again.
It is now thought that modern systems of pain relief e.g. TENS machines, work by mildly stimulating the nerve pathways. All the receptors are filled, the gates shut and severe pain stimuli cannot be passed up the spinal cord to the brain. It has been hypothesized that Reflexology works in the same way as a TENS machine.