No. While most people associate highly-reflective floors with low traction and slippery tendencies, polished concrete is naturally slip-resistant. It has a naturally high coefficient of friction, meeting or exceeding national standards.
In simple terms, most people express the coefficient of friction as a decimal between 0 and 1, representing what percent of weight is converted to gripping strength. Most dry interior areas need at least .42 to be called non-slip, meaning 42% of a person’s weight becomes gripping strength.
Polished concrete varies between .49 and .59 depending on various factors, so it comfortably exceeds non-slip standards. It’s not appropriate for every area (like ADA-accessible outdoor ramps), but it’s more than good enough for most people in most situations.