UNIVERSITY HEALTH SCIENCE STUDY The following is a summary of a study titled, An Analysis of the Effects of Use
of the POWER STRIDE™ on Movement and Muscle Activation Patterns While Skating
on a Treadmill by Dr. William Gage, Ph.D., Assistant Professor, School of Kinesiology
and Health Science, Faculty of Health, York University.
AUTHOR'S BIOGRAPHY: Dr. William Gage Ph.D. is an Assistant Professor in the School of Kinesiology and
Health Science, in the Faculty of Health at York University, located in Toronto,
Dr. Gage also holds appointments as Adjunct Scientist at Toronto
Rehabilitation Institute, and Heart and Stroke Centre for Stroke Recovery at Sunnybrook
Health Sciences Centre. Dr. Gage’s research interests include biomechanics and neuromuscular
control of movement. He studies changes in postural control effects by aging and
pathology, with application to both sport and aging. He has a special interest in
understanding biomechanical and neuromuscular contributors to development and progression
of osteoarthritis. Dr. Gage regularly publishes the findings of his research in
international peer-reviewed scientific journals.
"The purpose of this study was to examine the effects of using a novel device called
the POWER STRIDE
™, to progressively load the distal aspect of the lower limb, on
the patterns of movement and muscle activity while skating.
The POWER STRIDE
™ has been developed as a training aid for hockey players, designed
to increase the physiological muscular load on the skater; examination of the kinematics
and muscle activity will provide insight to the potential value of such a device.
Movement pattern data (kinematics) were collected using a four-camera optoelectronic
motion capture system, and a four segment model of the lower limb; muscle activity
was recorded from four muscles of the lower limb; five healthy male volunteers participated
in this study.
The POWER STRIDE
™ functioned as expected, with no difficulties; researchers reported
that the device was easy to understand and simple to use; the POWER STRIDE
to hold the weights firmly to the skate boot, without shifting during the skating
movement, and at no time became loose or detached; skaters reported feeling comfortable
using the POWER STRIDE
Substantial differences were observed in the eccentricity of the foot trajectory
during skating, with increased distal lower limb mass; no differences were observed
in kinematic profiles of joint angular displacement, with exception of hip extension
which was increased slightly with added load.
Peak hip abduction angle was slightly reduced with added load, though net abduction
displacement (i.e., unbiased displacement) was not altered, suggesting skaters adopted
compensatory trunk postures.
Added distal lower limb mass may influence the load on hip extensors and abductors,
as well as hip flexors and adductors, and the trunk stabilizers such as the abdominal
musculature; these possibilities warrant further investigation, and potentially
represent effective methods of providing functional muscle strengthening about the
hip, groin, and trunk musculature
during skating, with positive implications for
." Dr. William Gage Ph.D., Assistant Professor
Faculty of Health, York University