During a lunar eclipse, the alignment of the Earth, Moon, and Sun causes the Moon to temporarily pass through Earth's shadow. However, this alignment does not significantly affect the gravitational forces acting on objects on Earth, including our bodies.
The phenomenon of tides is primarily caused by the gravitational pull of the Moon and, to a lesser extent, the Sun on the Earth's oceans. The gravitational force exerted by these celestial bodies affects the water, creating the tidal bulges that we observe. It's important to note that the gravitational force acting on an object depends on the mass of the celestial body and the distance between the object and that body.
During a lunar eclipse, the alignment of the Earth, Moon, and Sun does not change the mass or distance of these bodies significantly. The Moon does pass through Earth's shadow, but this event does not alter the overall gravitational forces acting on Earth. As a result, your weight, which is a measure of the force of gravity acting on your body, remains essentially unchanged during a lunar eclipse.
It's worth mentioning that the effect of tides on your weight is relatively small even under normal circumstances. The gravitational force exerted by the Moon and Sun on your body is significantly weaker than the gravitational force exerted by the Earth. Therefore, any changes in tidal forces during a lunar eclipse would have an even smaller impact on your weight and would likely be imperceptible.