Multi-sport racing is a balance between energy conservation and expenditure.
http://us.rd.yahoo.com/dailynews/rss/search/cycling+racing/SIG=12ckf59r4/*http%3A//www.runnersweb.com/running/news/rw_news_20051208_TSF_Tactics.html
http://us.rd.yahoo.com/dailynews/rss/search/cycling+racing/SIG=12ckf59r4/*http%3A//www.runnersweb.com/running/news/rw_news_20051208_TSF_Tactics.html