Updates are available Correction dated 2020-01-29

Article History

Received: 29 September 2017

Accepted: 25 June 2018

First Online: 17 July 2018

Change Date: 29 January 2020

Change Type: Correction

Change Details: Following publication of the original article [1], the authors reported an error in the following sentence on page 8: “In general, knee varus (negative ΔD*) is a much more common deficit than valgus, and a more negative ΔD* value in the novice squatters compared to the experienced ones was therefore expected.”

Ethics approval and consent to participate

: The survey of data in this study followed the cohort study design. The Ethical Committee of the Eidgenössische Technische Hochschule Zurich endorsed the study design protocol (EK 2015-N-27) prior to participant acquisition. All participants received written information on the course of study and provided written, informed consent prior to starting measurements. This study was performed according to the Declarations of Helsinki.

: The participant in the picture provided written informed consent that the picture can be published.

: The authors declare that they have no competing interests.

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