
According to Discovery News:
Archaeological evidence suggests humans started skating on ice
approximately in the second millennium B.C. The oldest known ice
skates, found throughout Scandinavia, were made mostly of horse and cow
bones, pierced at one end and bound to the foot with leather straps.
Bones lack the edge necessary for the modern skating stride, so
forward propulsion came from the person's upper limbs: a stick was
pushed backward between the legs, which were kept almost straight.
Slow and awkward but effective, especially in Finland:
The researchers measured the skaters' heart rates, oxygen intake and
skating speeds, and the results were fed into computer simulations to
determine how much energy our ancestors would have saved using skates
during each of 240 six-mile journeys in different parts of northern
Europe.
It emerged that while the energy saving was only 3 percent in
Norway, and 1 percent or less in Sweden, Germany and the Netherlands,
skating across Finland's lakes would save 10 percent of people's
energy.
The researchers believe that in Finland, the strong presence of
lakes of irregular shape could force humans to develop ice skates in
order to limit the energy cost of traveling.
"Ice skates in Finland were a huge benefit. Our study does not
provide conclusive evidence that ice skating originated in that
country, but poses strong basis for this hypothesis. In other words, if
I were an archaeologist searching for the oldest ice skates, I would
certainly start from Finland," Formenti said.