Question

Can you get younger by traveling at speeds near the speed of light? Explain using 3 or more complete sentences.

Answer 1

Well, at first, since we will try getting used to that speed, our skin shall peel of and some of our liquids could spill out involuntarily, causing us biological uncomfort and perhaps diseases.
Other than that, we could lose weight because there is a lot of kinetic energy, which will be resisted by resistive force and this causes the release of heat energy (sweat). Therefore we lose weight.
Also, the speed which we will travel with, we shall get used to it mentally, because most of the information will be coming in fractions of a second and we should be able to cope with that.

Answer 2

You will not "reverse age" by travelling at such hight speeds but the effect of special relativity is that your clock will run slower and so you will age more slowly -- and your pulse rate and everything else within your reference frame too. You would not notice this because everything to you would seem normal. everyone moving at that speed would continue as normal (though there would be serious issues with clock synchronisation between clocks at the back and front end of the ship).

Google the twin paradox and you should find plenty about this of all difficulty levels.and loads of helpful animations

The twin that is shot through space at these high speeds returns to find that his twin who remained on earth is much older than he. it's real. it's also one of the main themes in Interstellar. The paradox is not why has this happened because it is experimentally proven that it does. the paradox is how do we know which one should have aged -- but that's another matter.

but no, you will not get younger buy you will age more slowly compared to certain other reference frames.