Gels are materials composed of a three-dimensional crosslinked polymer or colloidal network immersed in a fluid. They are usually soft and weak, but can be made hard and tough. Hydrogels are gels ...

The best energy gels, those small pockets of power, have become a staple in the triathlete’s larder. Where once their viscosity reached such extreme levels that it was like squeezing out the remnants ...