Paragraph 2
The researchers said our
are important for helping us live
. Stronger muscles give many health benefits. Muscles control how much
and harmful fats are in our
. If our muscles are not
, they do not burn up so much sugar. Instead, this is turned into body fat. This can lead to
, heart disease and other health problems. A website advised
to walk, cycle, swim, "or do whatever gets your heart
up". It also said
were good. The
is published in the British Journal of Sports Medicine.
