Norway’s cross-country skiing star Therese Johaug will in all likelihood not take part in the Tour de Ski before the Winter Olympics in Beijing. The Tour de Ski starts December 28 in Switzerland and ends January 4 – a month before the Olympics begin. The 33-year-old told Norway’s TV2 she plans to instead attend an altitude training camp abroad until December 26 before travelling home for 14 days. The 14-times world champion said it had been hard to tell her parents that for the first time in her life she wouldn’t be home on Christmas Eve. Johaug separately told the newspaper Verdens Gang and t…