Timothy Shields earned his MBA from Stanford University and began a career in finance, working for UBS in Chicago. In his spare time, he enjoys running and cycling. The document then provides suggestions for modifying running routines through interval training, including running repeats which alternate bursts of speed with intervals of rest, and "climbing a ladder" by gradually increasing the distance run after periods of rest.

2.  Timothy Shields studied business as a graduate
student at Stanford University. After earning his MBA
from Stanford, Timothy Shields began a career in
finance that in 2002 brought him to UBS in Chicago.
When he is not serving as a company executive, Tim
Shields likes to run and ride his bike.
Running is an effective way to stay fit, though it can
be easy to get caught up in a running routine and
subsequently lose interest. Running a set of repeats is
one way to change up the approach. Instead of
running at a steady pace for the duration of a
workout, repeats encourage an individual to run at
top speed for a short distance or period of time.

3.  These bursts of speed are countered by
intervals of rest before the process begins
again.
“Climbing a ladder” is another way to modify a
running routine. Begin with a relatively short
distance, such as 200 meters, before resting.
The next period of running should be increased
to about 400 meters, and after another rest
period, raised to 600, and so on. A ladder
workout will help runners improve their stamina
management, covering one distance while
leaving sufficient energy in reserve to take on
the next.