内容正文:
Unit
3 Faster,
higher,
stronger
课时作业 7
阅读理解
A
This
activity
will
melt
away
the
pounds,
build
up
your
body
and
leave
you
on
an
emotional
high.
Yet
the
form
of
exercise
destined
to
become
the
fitness
trend
of
the
year
does
not
require
gym
membership
or
a
personal
trainer.
All
you
need
to
do
is
walk.
“ Walking
is
a
refreshing
alternative
to
complicated
aerobic
( 有 氧 的)
routines
and
overpriced
gym
membership,”
says
personal
trainer
Lucy
Knight,
the
author
of
a
new
book
on
the
exercise.
“ It
is
free,
enjoyable
and
already
a
part
of
everyday
life.
All
you
need
to
do
is
correct
your
technique,
and
walk
faster
and
longer,
and
you
will
lose
weight. ”
Scientists
at
the
University
of
Pittsburgh
recently
revealed
that
overweight
people
who
walked
briskly
(轻
快地)
for
30
to
60
minutes
a
day
would
lose
weight
even
if
they
didnt
change
any
other
living
habits.
Another
American
study
found
that
people
who
walked
for
at
least
four
hours
a
week
gained
less
weight
than
couch
potatoes
as
they
got
older.
Researchers
at
the
University
of
Massachusetts
Medical
School
found
that
people
who
walked
every
day
had
fewer
colds
than
those
who
sat
a
lot.
Best
of
all,
walking
makes
you
feel
good
about
yourself.
“ For
people
suffering
from
depression,
walking
three
to
four
times
a
week
for
30
minutes
has
been
shown
to
lift
their
mood,”
says
Knight.
How
will
you
lose
weight
and
keep
healthy?
Health
experts
recommend
that
we
should
walk
10,000
steps
a
day
to
stay
healthy.
Actually
you
would