CROSS-COUNTRY SKIING – 8-WEEK GET FIT PROGRAM Build your fitness, endurance and confidence on skis with this structured 8-week training plan. This program is designed for recreational and intermediate cross-country skiers who want to improve their aerobic fitness, endurance, ski-specific strength and overall skiing performance. The program combines easy aerobic endurance, fartlek training, threshold work, strength training and long easy endurance sessions. The training progresses gradually ...