ABSTRACTSince the 1960s environmental problems have increasingly been on the agenda in Western countries. Global warming and climate change have increased concerns among scientists, politicians and the general population. While both elite sport and mass sport are part of the consumer culture that leads to ecological problems, sport philosophers, with few exceptions, have not discussed what an ecologically acceptable sport would look like. My goal in this article is to present a radical model of ecological sport based on Arne Naess’s (...) version of deep ecology called ecosophyT. After outlining the Naessian ecocentric view of biospheric egalitarianism I present the consequences for sport and physical activities. I also give examples from Arne Naess’s own practice of sport which was guided by the principle ‘Richness in ends, simplicity in means!’ I discuss whether Naessian deep ecological sport is what we will all end up with after the ecocatastrophe or whether it can be an inspiring ideal for many of us right now. (shrink)