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fartlek
fartlek
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fartlek
Fartlek is Swedish for “speed play”.
Note from the editor

Fartlek is Swedish for “speed play”.

Editors
Go to the profile of George Leontiev
George Leontiev
Engineer, runner
Go to the profile of Svanlaug Ingólfsdóttir
Svanlaug Ingólfsdóttir