Fitness walking poles are usually supplied with paws especially designed for walking on asphalt. These paws are set at the particular angle to make them hit the ground in the right way. Sometimes walkers use a rubber tip that resembles a cane tip and wears unevenly. If removed, there is a carbide tip underneath that is used for natural trails. And if you walk in snowy, sandy or soft trails you should supply your poles with trekking baskets that keep them from sinking.
A tip to help you facilitate your poles walking workout is to have poles that consist of cork so that they reduce shock. Springs can also act as shock absorbers. But these systems add weight to your poles so they should be properly adjusted to meet your height.