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PhysiRun Live mobile user manual v1.3.1 Date: 02.05.2019
Copyright © 2018-2019, All Rights Reserved - Gait Up SA. CH-1015 Switzerland
14
6.
Running Parameter Overview
Pronation angle
is the sideward inclination of the foot when it hits the ground.
It indicates if the runner's foot touches the ground in an eversion or inversion
position. Negative values are associated with inversion, positive with eversion.
Strike angle
indicates the forward inclination of the foot when it hits the ground.
Foot-strike types include forefoot, midfoot and rearfoot/heel strike types; these
are characterized by initial contact of the ball of the foot, ball and heel of the
foot simultaneously and heel of the foot respectively. The associated angle is
positive for heel strike, around zero for midfoot and negative for forefoot strike.
Contact time
measures the average time (in milliseconds) of ground foot
contact. It decreases with increasing speed and is generally higher for rear foot
strike runners than mid and forefoot runners.
Subjects
Speed
Contact time
Study
reference
Usain Bolt
40 km/h
83
±2ms (100m sprint)
Female Amateur
Athletes (n=30)
21 km/h
140
±11ms for sprinters
160
±13ms for long-distance runners
Cunninghal
2013
Half-marathon
participants (n=283)
18 km/h
183
±16ms for mid/front strike
runners
200
±21.3ms for rear strike runners
Hasegawa 2007
Female Amateur
Athletes (n=30)
15 km/h
180
±16ms for sprinters
250
±20ms for long-distance runners
Cunninghal
2013
Trail Ultra-Marathon
runners (n=18)
10 km/h
249
±16ms at start of race
252
±17ms after 3h of running
Morin 2011
Novice runners (n=210) 9 km/h
236
±26ms
Bredeweg 2013
Asymmetry
is the ratio of contact times between sides. Perfect symmetry is
given by a 0% value, values on the left side of the zero appear when left contact
time is higher than for the right side and vice-versa.
