Vito Acconci, Step Piece, 1970

In «Step Piece» Acconci stepped on and off a stool in his apartment every morning at the rate of thirty steps a minute, continuing the effort for as long as possible; the results of his «daily improvement» were distributed to the art public in the form of monthly progress reports.

(Source: Kate Linker, Vito Acconci, Rizzoli, New York,