Ions are defined as . atoms that have lost or gained an electron and have a charge. neutral atoms atoms that are bonded to other atoms of the same element nuclear atoms

We also sweat while we exercise. while we exercise, we do burn glucose and in the process generate the energy we need. that energy also causes us to heat up and as part of our temperature regulation mechanism, we sweat to get rid of the excess heat. and that water that we sweat has a fairly large amount of mass which we then lose.