The exercise must be completed while sitting, hence the need for a workstation. Cement and an angular profile enhance the rigidity of the act.  Photo 1 of 4 in Daniel Libeskind Designs Table for Marina Abramovic Exercise by Allie Weiss

Daniel Libeskind Designs Table for Marina Abramovic Exercise

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The exercise must be completed while sitting, hence the need for a workstation. Cement and an angular profile enhance the rigidity of the act.