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Martina Oetliker
12-13-1999, 01:19 AM
One month ago I posted a question about gait cycles in humans and DOGS.
Unfortunately it took quite a while to get all the references from the
various libraries. I got several references for the number of human gait
cycles an could confirm the number I had in mind. But unfortunately I did
not get any numbers for canine gait cycles, the thing I was most interested
in.

thanks to all the people that helped me
Martina

The original posting was:

Dear subscribers

I'm a veterinarian doing my PhD on a THR in dogs. I am looking for
literature and references the number of gait cycles in human and dog per
year. As far as I remember one says that a human with a THR is doing
about 1Mio of gait cycles per year and dogs about 3 to 5 Mio/year. But I
can't find the reference anymore.

I will post a summery with all the references.
Thanks for your help in advance.
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The reference I have for the number of human gait cycles per year is
Wallbridge N, and Dowson D "The Walking Activity of patients with
artificial hip joints" Engineering in Medicine 1982; 11: 95-96

They give a range from 0.5 to 3 million depending on age and activity
level.

hope this helps

Mark


Mark S Thompson
PhD Student
Interdisciplinary Research Centre in Biomedical Materials,
Queen Mary and Westfield College,
London
E1 4NS
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Numbers in the paper:
They looked at 9 female and two male patients (age 44 to 76) with one or
two THR. The average was 3975 gait cycles per day (2371 to 5714 per day,
this is 860000 to 2'085'600 steps per year)
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I know of three papers that look at the number of cycles in HUMAN normals and
HUMANS with THR.

I think it is the first one that quotes a few other studies for comparison.

Hope this helps

Julie Matthews
Integrum, Sweden

1. Schmalzried, T., et al., Quantitative assessment of walking
activity after
total hip or knee replacement. Journal of Bone and Joint Surgery
(Am), 1998.
80(1): p. 54-59.
2. Schmalzried, T., et al., Factors correlating with long term
survival of
McKee-Farrar total hip prostheses. Clin-Orthop, 1996. 329Suppl: p.
S48,-59.
3. Seedhom, B. and N. Wallbridge, Walking activities and wear of
prostheses.
Annals of the Rheumatic Diseases, 1985. 44(12): p. 838-843.


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Numbers in the paper:
1. total of 111 patients, 57 men, 54 women, age 60 62.
Average number of steps per
day: 4988 (910'310 per year)
3. 243 individuals (144 m, 99f), age 17 - 83; only littel correlation
betweesn varables as age, height
and weight and their speed of walking and walked distance. men had
an average of 9'537 steps
per day (1'600 - 35'500) and women 9'839 steps per day (1'200 -
32'600).
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I collated the responses from this query from BIOMCH-L 18/7/95:

http://guardian.curtin.edu.au/cga/faq/loading.html
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We did a study on 42 THA patients. The reference is given, the
numbers found are shown in the attachment.
(They measured 6376 gait cyles/day and 264 stair steps/day on average)

Morlock, M., Bluhm, A., Vollmer, M., Müller, V., Honl, M., Hille, E.,
Schneider, E. and Bergmann, G. "Quantification of Duration and Frequency of
every day activities in total hip patients with a mini computer system", Book
of Abstracts, International Society of Biomechanics XVIIth Congress, p. 84,
1999.


MfG
MMM

----------------------------------------------------
PD Dr.habil. Michael M. Morlock Ph.D.
Biomechanics Section
Technical University Hamburg-Harburg
Harburger Schloss-Strasse 36
21079 Hamburg, Germany
phone: +49 - 40 - 42878 3175
fax: +49 - 40 - 42878 2996
email: morlock@tu-harburg.de
http://www.tu-harburg.de/bim
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The only reference that I have is:

Sequeira, M.M., Rickenbach, M., Wietlisbach, V., Tullen, B., and Schutz, Y.
(1995) ìPhysical Activity Assessment Using a Pedometer and Its Comparison with
a Questionnaire in a Large Population Surveyî, Am J Epidemiol, 142:989-99.

Unfortunately I don't have it in hand, but I know that it covered a wide range
of subjects.

-Derek Lindsey
University of California, Davis
Biomedical Engineering Graduate Group

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Numbers in the paper:
493 (265m, 228f) inidviduals, age 25 - 74. the average number of steps per
day decreased from 11'900 to 6'700 and from 9'300 to 7'300 for men and
women, respectively, in the youngest to the oldest groups.
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I did a one person test for one year to count the number of steps. It came
out to about 4 million for the year. Unpublished but in the works.

I would be interested in hearing what information you get.

Best regards,
Peter

Peter A. Torzilli, Ph.D.
Laboratory for Soft Tissue Research
Hospital for Special Surgery
535 East 70th Street
New York, NY 10021-4892
Office: 212-606-1087
FAX: 212-249-2373
email: torzillip@hss.edu

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The human reference is N. Wallbridge and D. Dowson (1982) The walking
activity of patients with artificial joints Engineering in Medicine Vol 11
pp 96-97 and was from pedometry data and gave 0.5 to 2 miilion cycles per
year for humans dropping with age.

Yours

Liz Tanner
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I can't help with the number of dog cycles but human I can.
Try Schmalzried et al (1998) J. of Bone and Joint Surgery, 80-A, 54-59.

Regards,
Dr. Simon Smith
University of Durham
England
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Clinic for Small Animals
Divison of Surgery and Orthopaedics
University of Berne
Laenggass-Strasse 128
CH-3012 BERNE
SWITZERLAND
Tel: +41 31 631 23 15
dir: +41 31 631 24 01
internet: martina.oetliker@kkh.unibe.ch

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