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Although I couldn’t find evidence-based literature concerning your specific use of TENS, I will try to give your some clarifications concerning your question:
First, what is TENS: Transcutaneous electrical stimulation (TENS) is the application of electrical current through electrodes placed on the skin. Varying frequencies can be applied, from low (< 10 ...
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The two proposed mechanisms for paresthesia/tetany secondary to hyperventilation are cerebral vasoconstriction and electrolyte imbalance.
Cerebral vasoconstriction: Cerebral blood flow decreases in a linear relationship to decreased PaCO2 (partial pressure of carbon dioxide). Thus, hyperventilation -> decreased PaCO2 -> decreased cerebral blood flow -&...
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Very probably not.(1)
This sounds like an issue with nerves (especially a pinched nerve) that makes your Brain unable to "proper" communicate with your leg, hence the jelly-like feeling.
However, I would expect your leg to feel numb or "pins and needle" pain.
Not feeling your leg in the morning seems normal to me (i.e. paresthesia), but falling because you ...
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I will not get into the possible association between your symptoms and treadmill or any possible etiologies regarding your symptoms. However, I am fairly certain that your numbness has nothing to do with your accident.
When we are considering symptoms in limb and possible spinal injury the pathophysiology would be some kind of nerve or medullar compression ...
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