Basics of Biomechanics

Dusan Radovanovic, Zurich

Duesseldorf 14th Nov. 2006

History

Summer 1997 until April 1998 Gaitway Kistler System under test in own practice

Study of patients with knee disorders Publication

„Gait- and motion analysis in physiotherapy. Possibilities of therapy for knee disorders for leisure athletes by altering the running technique".

Scientific Award of Association for Sports Medicine Switzerland

Practice

Practice

Treadmill Gaitway used since May 1998

Used Measurement System Gaitway

Action – Reaction„Center of Pressure“

Registration of Patients

Acceptance

Vertical Bottom-Reaction-Force-Curve

20-30% des KG

110-120% des KG

80% des KG

130% des KG

Recording min. 10‘‘4.0km/h

links

rechts

walking in normal shoes

Ideal Vertical Bottom-Reaction-Force-Curve

walking 4.03 km/h cadence 112 / min. 10“ 9x left 8x right

Horizontal (frontal) Bottom-Reaction-Force-Curve

First peak

Standing phase

rightleft

Heel strike

Push-off-phase

Vertical Bottom-Reaction-Force-Curve

running, barefoot 8 km/h

2.5 x KG

Practical Examples

Arthritis in the upper ankle (left) & Femoropatellares syndrome

(right)4 weeks later

Calcaneal Spur

walking

8 weeks later

Calcaneal Spur

running

10 weeks later

Tendovaginitis Tibialis posterior, Flexor hallucis longus and Flexor digitorum

longus

Jumpers knee left

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8-10

0

10

20

30

40

50

60

70

80

90

100

Relative Time (s)

Kil

og

ram

s (k

gf)

Force

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8-100

102030405060708090

100

Relative Time (s)

Kilo

gram

s (k

gf)

Force

21 days later

“ Runners knee “

0 0.04 0.08 0.12 0.16 0.20 0.24-20

0

20

40

60

80

100

120

140

160

Relative Time (s)

Kilo

gra

ms

(kg

f)

Force

running shoes

barefoot

VKB plastic right

2 years after operation

Several surgeries left knee

0 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.22-40

0

40

80

120

160

200

240

280

Relative Time (s)

Kil

og

ram

s (k

gf)

Force

8 kmh

8 km/h

13 km/h

Knee pains left > right after 10 min. running with heel run technique

Forefoot run technique

with running shoes barefoot

Gonarthritis right

0 0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32-20

0

20

40

60

80

100

120

140

160

180

Relative Time (s)

Kilo

gra

ms

(kg

f)

Force

0 0.05 0.10 0.15 0.20 0.25 0.30-200

20406080

100120140160180

Relative Time (s)

Kil

og

ram

s (

kg

f)

Force

heel run technique forefoot run technique

Patellae multiple fracture

heel run technique

forefoot run technique

Total implant left knee

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8-100

102030405060708090

100

Relative Time (s)

Kilo

gram

s (k

gf)

Force

VKB plastic3 weeks after surgery 6 weeks after surgery

8 weeks after surgery 12 weeks after surgery

Running after 12 and 14 weeks

Femoropatellares syndrome8 weeks later

Gonarthritis3 months later

VKB plastic, Tibia head synthesis, metal removed

Coxarthritis bds

20 min. after specific exercises

Femoroacetabulare impingement syndrome right

Status after arthroscopic surgery

After correction of walking technique

Hip pain bds

ISG blocking

6 weeks after specifictraining

Blocked ISG on surgery side

Adductore strain right; ISG blocking right

Disk hernia L5 / S1

4 days later

Tractus Iliotibialis syndrome

Conclusion

The running machine with integrated force platforms is perfect for

Diagnostics Documentation of Results Trend Monitoring Control of Results Control Quality Assurance for Physiotherapy and Sports Medicine

Thank you