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Cold-water immersion is used in many
for its healing benefits. For
, ice baths have helped to speed the recovery of
following energy-sapping performances. The researcher said: "Two weeks of
therapeutic cold-water immersion improved
sleep, with fewer sleep
." Taking cold-water baths for health purposes is already a
practice. At the New Year, people worldwide swim in
seas and lakes. In Japan,
refresh their bodies by dipping in and out of hot and cold baths. This a
called toto-no-u.
