Low-friction slider insert for sliding tubes

A sliding apparatus for use in fitness equipment comprising:

• a first sliding member having a wall with an outer wall surface and an inner wall surface opposite the outer wall surface that defines a central opening;
• an elongate second sliding member having a wall with an outer wall surface and sized and configured for sliding insertion into the central opening of the first sliding member such that the first sliding member can slide along and be fixed at a selected location along the length of the second sliding member;
• a space formed between the inner wall surface of the first sliding member and the outer wall surface of the second sliding member when the second sliding member is located within the central opening of the first sliding member;
• a low-friction slider insert comprising:
• a center section;
• a pair of lips extending outwardly from the center section and configured to engage a portion of the first sliding member to removably mount the slider to the first sliding member such that the slider insert is positioned in the space between the inner wall of the first sliding member and the outer wall of the second sliding member and slides with the first sliding member along the second sliding member.