The Relationship between the Electrical Activity of Muscles and the Change of Speed of Walking and Running in Children

Abstract

The relationship between the electrical activity of muscles and the oxygen requirement with the change of speed in walking and running concerning adult subjects was discussed in the previous paper.
In this paper.the relationship of the speed of walking and running to electrical activity of muscles in children under development was studied to investigate whether there is the same relationship which was obtained in adults.
Twenty-nine healthy boys and tw enty-one girls ranging from five to thirteen years old, and five male and three female adults participated in the experiment.
EMG activity in the right leg was recorded from the following muscles of all the subjects.
Tibialis anterior, Soleus, Gastrocnemius, Vastus medialis, Rectus femoris, Bicep s femoris, and Gluteus maximus.
All the female subjects and some of the male subjects had additional muscles monitored as described below:
Rectus abdom inis, Sacrospinalis, Deltoid anterior portion, and Deltoid posterior portion.
The series of tests consisted of seven speeds or more for walking and twelve speeds or more for running which varied from 30 meters per minute to their maximal walking and running speeds.
In addition, the relationship between the electrical activity of muscles and the oxygen requirement was examined in the six boy subjects which are two 6 years, two 8 years, and two 10 years of age respectively