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. 2019 Feb 18;10(2):90–100. doi: 10.5312/wjo.v10.i2.90

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©The Author(s) 2019. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.

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If there are any particular activities that you now no longer perform, what is/are the reason(s) for it?. THR: Total hip replacement; TKR: Total knee replacement.