Effective gait therapy is critical to children who have difficulty walking due to developmental, neurologic, or orthopedic conditions. Current gait training technologies can be cost prohibitive and often do not address the needs of children of varying sizes. In addition, clinicians often need to provide significant physical assistance to children with profound weakness. Based on the success of an elliptical-based adult-sized intelligently controlled assistive rehabilitation elliptical (ICARE) system for gait training, a modified technology was proposed to address the needs of younger/smaller children. The new design relied on a screw-and-slider joint to adjust the effective length of the crank link in the elliptical mechanism, reducing the step length and stride height simultaneously. The new trajectories of the foot pedal were normalized against stride length and showed nearly identical trajectories between pediatric strides and adult strides. Simulation results and human usability studies verified that the design was feasible.

References

References
1.
Nelson
,
C. A.
,
Burnfield
,
J. M.
,
Shu
,
Y.
,
Buster
,
T. W.
,
Taylor
,
A. P.
, and
Graham
,
A.
,
2011
, “
Modified Elliptical Machine Motor-Drive Design for Assistive Gait Rehabilitation
,”
ASME J. Med. Devices
,
5
(
2
), p.
021001
.
2.
Burnfield
,
J. M.
,
Irons
,
S. L.
,
Buster
,
T. W.
,
Taylor
,
A. P.
,
Hildner
,
G. A.
, and
Shu
,
Y.
,
2014
, “
Comparative Analysis of Speed's Impact on Muscle Demands During Partial Body Weight Support Motor-Assisted Elliptical Training
,”
Gait Posture
,
39
(
1
), pp.
314
320
.
3.
Burnfield
,
J. M.
,
Shu
,
Y.
,
Buster
,
T. W.
,
Taylor
,
A.
, and
Nelson
,
C. A.
,
2011
, “
Impact of Elliptical Trainer Ergonomic Modifications on Perceptions of Safety, Comfort, Workout and Usability for People With Physical Disabilities and Chronic Conditions
,”
Phys. Ther.
,
91
(
11
), pp.
1604
1617
.
4.
Burnfield
,
J. M.
,
Shu
,
Y.
,
Buster
,
T. W.
, and
Taylor
,
A. P.
,
2010
, “
Similarity of Joint Kinematics and Muscle Demands Between Elliptical Training and Walking: Implications for Practice
,”
Phys. Ther.
,
90
(
2
), pp.
289
305
.
5.
Burnfield
,
J. M.
,
Taylor
,
A. P.
,
Buster
,
T. W.
,
Shu
,
Y.
,
Goldman
,
A. J.
, and
Nelson
,
C. A.
,
2011
, “
Use of Intelligently Controlled Assistive Rehabilitation Elliptical Trainer to Improve Walking and Fitness During Acute Stroke Rehabilitation
,”
Stroke
,
42
(
3
), p.
e326
.
6.
Burnfield
,
J. M.
,
Yeseta
,
M.
,
Buster
,
T. W.
,
Taylor
,
A. P.
, and
Shu
,
Y.
,
2012
, “
Individuals With Physical Limitations Can Benefit From Training on a Motorized Elliptical for Community-Based Exercise
,”
Med. Sci. Sports Exercise
,
45
(
5 Suppl.
), p.
S360
.
7.
Yeseta
,
M. C.
,
Taylor
,
A. P.
,
Buster
,
T. W.
,
Shu
,
Y.
, and
Burnfield
,
J. M.
,
2012
, “
Exercise Endurance and Functional Mobility Improve for Individuals With Physical Disabilities After Training on a Motorized Elliptical
,”
Rehabilitation Engineering and Assistive Technology Society of North America's 2012 Annual Conference
(
RESNA 2012
), Baltimore, MD, June 28–July 3.
8.
Sutherland
,
D.
,
1997
, “
The Development of Mature Gait
,”
Gait Posture
,
6
(
2
), pp.
163
170
.
9.
Hof
,
A. L.
,
1996
, “
Scaling Gait Data to Body Size
,”
Gait Posture
,
4
(
3
), pp.
222
223
.
10.
Budynas
,
R. G.
, and
Nisbett
,
K. J.
,
2008
,
Shigley's Mechanical Engineering Design
,
8th ed.
,
McGraw-Hill
,
New York
.
11.
Hallquist
,
J. O.
,
2001
, “
ls-dyna Keyword User's Manual
,”
Livermore Software Technology Corporation
,
Livermore, CA
.
You do not currently have access to this content.