  Running is part of almost every sport, and requires a great amount of
stamina, endurance, mental toughness and overall strength. At every step, the
foot experiences ground reaction forces necessary to support the motion of the
body. With the advancements in shoe technology, running shoes have grown in
popularity among runners, as well as non-runners, because they reduce the risk
of injuries from the impact felt by the foot. The purpose of this report is to
analyze the effect of running shoes on impact forces on the foot. This is
achieved through the use of three force pads fixed at different locations on
the foot The force measured by each sensor is then used to estimate the
vertical ground reaction force, using the sensors' calibrations equations .
Based on the ground reaction force, the effective mass corresponding to the
momentum change occurring during the transient phase of the impact is
estimated. The results show that running at 9 miles per hour without running
shoes generates an effective mass of (14.9 +/- 4.8)% of the total body mass,
while running at the same speed with running shoes generates an effective mass
of (7.8 +/- 1.5 )% of the total body mass. The values highlight a significant
reduction in the risk of pain or injuries accomplished by wearing running shoes
