According to our current understanding of physics, it is not possible to travel faster than the speed of light in a vacuum. The speed of light in a vacuum is considered to be the cosmic speed limit, as described by Einstein's theory of relativity.
As an object with mass approaches the speed of light, its energy and momentum increase without bound, making it impossible to reach or exceed the speed of light itself. This concept is often referred to as "relativistic mass increase."
If we were to assume, hypothetically, that an object could somehow exceed the speed of light, it would lead to several consequences that defy our current understanding of physics. This scenario is commonly referred to as "superluminal" travel.
One of the notable implications of superluminal travel is the violation of causality, which is the idea that cause and effect must occur in a specific order. If an object were to travel faster than light, it could potentially reach a destination before the signals or events that caused its departure, leading to paradoxes and contradictions.
As for the effects on the human body, it is challenging to speculate since our knowledge of such scenarios is purely hypothetical. However, if we assume that an object or a person could somehow achieve superluminal speeds, it might have severe consequences.
For instance, as an object approaches the speed of light, its mass increases, and time dilation occurs. Time dilation means that time would appear to pass more slowly for the moving object relative to a stationary observer. This effect becomes more pronounced as the object's speed approaches the speed of light. Therefore, if an object were to travel faster than light, time dilation might become extreme, leading to various strange effects on the body and perception of time.
However, it's important to emphasize that currently, there is no evidence or scientific consensus on the existence of methods or phenomena that can exceed the speed of light. Our current understanding of physics, as described by the theory of relativity, suggests that superluminal travel is not possible within the framework of known natural laws.