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Evaluating Muscle Contraction with Tensiomyography What is - - PowerPoint PPT Presentation
Evaluating Muscle Contraction with Tensiomyography What is - - PowerPoint PPT Presentation
Evaluating Muscle Contraction with Tensiomyography What is Tensiomyography? Diagnostic method Contractile properties Superficial skeletal muscle Application areas Sport Performance, Injury prevention Medicine Rehabilitation monitoring
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Application areas
Sport – Performance, Injury prevention Medicine – Rehabilitation monitoring Research – Scientific publications
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Tensiomyography
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Tensiomyography
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1 2 3 4 5 6 7 8 9 10 50 100 150 200 250 300 350 400 450 500
Displacement (mm) Time (ms) Td Tc Ts Tr Dm
TMG Parameters
Td - Delay time Tc - Contraction time Ts - Sustain time Tr - Relaxation time Dm - Displacement
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Muscle Response Scenarios
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Dm healthy: 4,3mm Dm injured 1: 2,6mm Dm injured 2: 9,0mm Tc healthy: 20,33ms Tc injured 1: 26,85ms Tc injured 2: 31,27ms
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1 2 3 4 5 6 7 8 9 10 1 15 29 43 57 71 85 99 113 127 141 155 169 183 197 211 225 239 253 267 281 295 309 323 337 351 365 379 393 407 421 435 449 463 477 Healthy Injured 1 Injured 2
Sensitivity: raw data signals
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Reference database Male
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Basic Results
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Lateral and Functional Symmetry
- Lateral Symmetry
- Functional Symmetry - Antagonistic Pairs
- Functional Symmetry - Synergistic Pairs
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Lateral and Functional Symmetry
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Comments / Recomendations
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Rehabilitation Process Monitoring
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“Tensiomyography is used for follow-up the functional recovery
- f muscle
and to help decide return to play”
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XXIV International Conference on Sports Rehabilitation and Traumatology Clinical Practice Guidelines for Muscle Injury, FC Barcelona – Aspetar 11th-12th April, 2015 - London
FC Bacelona & ASPETAR Example :
“Management of a muscle injury”
Clinical history Physical exam US MRI Treatment Immediate X X Could be made anytime Rest Ice Compression Elevation Analgesia 12 hours X X 24 hours X X 48 hours X X Functional tests 1st week
Monitorize
players feelings X x To evaluate how the progression of loads are assumed Rehabilitatio n progressive protocol Weekly X X Return to play X X For follow-up the functional recovery and sometimes to help to decide return to play:
- Muscle: Tensiomyography, electromyography and strength tests.
- Player: GPS, HR and self administered scales during and after the rehabilitation sessions on field.
Initial acute phase Subacute and functional phase
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0,0 5,0 10,0 15,0 20,0 25,0 30,0 35,0 40,0 45,0 1 2 3 Tc (ms) Time
Hamstring (Biceps Femoris) injury
Healthy Injured
1st measurement: 4 days after the injury 2nd measurement: 10 days after the injury 3rd measurement: 16 days after the injury
Rehabilitation Monitoring
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100 200 300 400 500
- 0.5
0.5 1 1.5 2 2.5 3 3.5 4 4.5
čas / ms
- dmik / mm
desni m.VM, Tc=22ms levi m.VM, Tc=24ms 100 200 300 400 500
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1 2 3 4 5 6
čas / ms
- dmik / mm
desni m.RF, Tc=49ms levi m.RF, Tc=24ms 100 200 300 400 500
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0.5 1 1.5 2 2.5 3
čas / ms
- dmik / mm
desni m.VL, Tc=17ms levi m.VL, Tc=18ms
VM = 53 % RF = 59 % VL = 79 %
4 days after the surgery Patellar tendon graft
Knee Surgery - ACL
- --- Healthy leg
- --- Injured leg
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Recovery Monitoring – before/ after ACL surgery
Adaptation pattern to rehabilitation Is different for each muscle
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0,5 1 1,5 2 2,5 3 3,5
50 100 150 200 250 Amplitude(mm) Time (ms)
43% difference in Tc
Other Diagnostic Methods
Healthy leg Injured leg
Hamstring (Biceps Femoris) injury
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0,5 1 1,5 2 2,5 3 10 20 30 40 50 60 70 80 90 100 110 120
mm ms
TMG response (Biceps Femoris - BF) after 60m sprint
before 1 - 60m 2 - 60m 3 - 60m 4 - 60m 5 - 60m 6 - 60m
Muscle Fatigue Monitoring
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BF response after 60m sprint
17 18 19 20 21 22 23 24 25 before 1 - 60m 2 - 60m 3 - 60m 4 - 60m 5 - 60m 6 - 60m
sets ms Tc (ms) Td (ms)
Muscle Fatigue Monitoring
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Muscle Recovery Monitoring
5 10 15 20 200 400 600 800 1000 1200 mm s
Acute local muscle fatigue test (Biceps Brachii) Displacement - Dm
20 25 30 35
200 400 600 800 1000 1200
ms s
Tc
Acute local muscle fatigue test (BicepsBrachii) Contraction Time - Tc
Muscle fatigue protocol Muscle fatigue protocol
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Non-invasiveness (No conflict with rehabilitation process) Selectiveness Simplicity High objectivity (no influence of motivation) Immediate interpretation of results
Tensiomyography
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