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Easy: flat
or undulating terrain
Moderate: a few ups and downs,
the section requiring more effort than an easy section. For example, a section
of 9 miles can require the amount of effort needed for 12 miles.
Strenuous: many ups and downs,
the section requiring more effort than a moderate section. For example,
a section of 9 miles can require the amount of effort needed for 15 miles.
Severe: many steep climbs,
the section requiring twice the amount of effort as an easy section. For
example, a section of 9 miles can require the amount of effort needed for
18 miles. |