Ambulatory measurement of ground reaction forces

Peter H Veltink, Christian Liedtke, Ed Droog, Herman van der Kooij
IEEE Transactions on Neural Systems and Rehabilitation Engineering 2005, 13 (3): 423-7
The measurement of ground reaction forces is important in the biomechanical analysis of gait and other motor activities. Many applications require full ambulatory measurement of these forces, but this is not supported by current measurement systems. We propose the use of two six-degrees-of-freedom force and moment sensors under each shoe, which enables the ambulatory measurement of ground reaction forces and centers of pressure (CoP). The feasibility of this method is illustrated by experimental results in a healthy subject, using a force plate as a reference. The ground reaction forces and CoP recordings show good correspondence when they are evaluated for forces above 40 N and when it is simply assumed that the sensors are flat on the ground when they are loaded. The root mean square (rms) difference of the magnitude of the ground reaction force over 12 gait trials was 15 +/- 2 N, corresponding to 1.9 +/- 0.3% of the maximum ground reaction force magnitude. The rms difference of the horizontal component of the ground reaction force was 3 +/- 2 N, corresponding to 0.4 +/- 0.2% of the maximum ground reaction force magnitude and to 2 +/- 1% of the maximum of the horizontal component of the ground reaction force. The rms distance between both CoP recordings is 2.9 +/- 0.4 mm, corresponding to 1.1 +/- 0.2% of the length of the shoe, when the trajectories are optimally aligned.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read

Save your favorite articles in one place with a free QxMD account.


Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"