Cross-country skier going across terrain (IMAGE)
Caption
New research shows that energy expenditure for cross-country skiers increases on uphills during long-distance skiing. Photo: Trine M. Seeberg
Credit
Trine Margrethe Seeberg
Usage Restrictions
Credit must be given to the creator. Only noncommercial uses of the work are permitted. Adaptations must be shared under the same terms.
License
CC BY-NC-SA