Scientists in Denmark have been studying over 1,000
joggers and nonjoggers for 12 years. The death rates from the
sample group indicate that people who jog at a moderate pace
two or three times a week for less than two and a half hours in
total are least likely to die. The best speed to jog at was found
to be about 5 miles per hour. The research suggests that
people who jog more than three times a week or at higher
speeds of over 7 mph die at the same rate as nonjoggers.
The
scientists think that this is because strenuous exercise causes
structural changes to the heart and arteries (动脉).Over time, this can cause serious injuries.
Peter Schnohr, a researcher in Copenhagen, said,
“If
your goal is to decrease risk of death and improve life
expectancy, jogging a few times a week at a moderate pace is
a good strategy. Anything more is not just unnecessary,
and it
may be harmful.”
The implications of this are that moderate forms of exercise such as t'ai chi, yoga and brisk walking may be better for us than “iron man” events, triathlons and longdistance running and cycling. According to Jacob Louis Marott, another researcher involved in the study, “You don't actually
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