Within a calendar year (or a month or a week), has anyone done a marathon run and a marathon swim (at least 10km in distance sans wetsuit or not), both under 3 hours? Are there endurance athletes who have swum a full 10 km marathon swim without a wetsuit, fins or paddles under 3 hours and who have also run a full 42 km marathon run under 3 hours? The 10km marathon swim can be done in fresh or salt water, but must be correctly measured by GPS and not done downstream in a flowing river. The swim can be done solo or as part of a race. If a wetsuit was worn, it must be identified. The marathon run can be done in any marathon running event or a solo run documented with GPS by an independent observer. http://www.openwaterswimming.com
Subject:RE: Marathon running and marathon swimming
dude, I don't know........although I tend to think anyone completing an IM marathon in less than 3 hours would be capable of doing a 10k swim in less than 3 hours. So, I think a lot of people could do it without additional training, I just don't think a lot of people are into swimming for 10k though.