Effect of hamstring architecture on sprint running recovery

1. The effect of concentric and eccentric knee
flexor strength training on recovery from sprint
training sessions, eccentric strength and biceps
femoris muscle architecture
Dr Steven Duhig (Griffith)
Dr Matthew Bourne (Griffith)
Dr Ryan Timmins (ACU)
Dr Morgan Williams (USW)
Dr Geoffrey Minnett (QUT)
Dr Llion Roberts (Griffith)
Mr Robert Buhmann (QUT)
Ms Casey Sims(QUT)
Dr Anthony Shield (QUT)

2. Lynn, Talbot & Morgan J Appl Physiol 1998, 85:98-104
Strength
loss after 20
eccentric
actions
High
Low
Up-hill running
concentric training
Down-hill running
eccentric training
Short fascicles
Long fascicles

3. What about humans / athletes?
Recovery
from high-
speed
running
???
???
Concentric
strength training
Eccentric
strength training
Short fascicles
Long fascicles

4. Research Questions
Do adaptations induced by eccentric training, in comparison with
concentric training, result in better maintenance of sprint performance
between sessions with reduced markers of muscle damage?
Does hamstring architecture affect isometric JAPT?

5. Methods – Pre intervention
N = 30 (15 CON; 15 ECC)
Strength (Nordic, ISOM JAPT)
N = 30 (15 CON; 15 ECC)
Strength (ISOM KF, NeSt)
Ultrasound

6. Methods – Pre intervention
N = 30 (15 CON; 15 ECC)
Strength (ISOM KF, NeSt)
Ultrasound

7. Methods – Pre intervention
N = 30 (15 CON; 15 ECC)
Strength (Nordic, ISOM JAPT)
N = 30 (15 CON; 15 ECC)
Strength (ISOM KF, NeSt)
Ultrasound

8. Week Sessions Sets Reps
1 2 2 6
2 2 3 6
3 2 4 6
4 2 5 6
5 1 5 6
Methods - Intervention

9. Methods – Post intervention
N = 30 (15 CON; 15 ECC)
Strength (Nordic, ISOM JAPT)
Ultrasound
Passive torque & blood collection
Strength (Nordic, ISOM JAPT)
Sprint 10 x 80m
Passive torque & blood collection
Sprint 10 x 80m

10. Methods – Post intervention
N = 30 (15 CON; 15 ECC)
Strength (Nordic, ISOM JAPT)
Ultrasound
Passive torque & blood collection
Strength (Nordic, ISOM JAPT)
Sprint 10 x 80m
Passive torque & blood collection
Sprint 10 x 80m

11. Methods – Post intervention
N = 30 (15 CON; 15 ECC)
Strength (Nordic, ISOM JAPT)
Ultrasound
Passive torque & blood collection
Strength (Nordic, ISOM JAPT)
Sprint 10 x 80m
Passive torque & blood collection
Sprint 10 x 80m

12. Methods – Post intervention
N = 30 (15 CON; 15 ECC)
Strength (Nordic, ISOM JAPT)
Ultrasound
Passive torque & blood collection
Strength (Nordic, ISOM JAPT)
Sprint 10 x 80m
Passive torque & blood collection
Sprint 10 x 80m

13. Methods – Post intervention
N = 30 (15 CON; 15 ECC)
Strength (Nordic, ISOM JAPT)
Ultrasound
Passive torque & blood collection
Strength (Nordic, ISOM JAPT)
Sprint 10 x 80m
Passive torque & blood collection
Sprint 10 x 80m

14. Methods – Post intervention
N = 30 (15 CON; 15 ECC)
Strength (Nordic, ISOM JAPT)
Ultrasound
Passive torque & blood collection
Strength (Nordic, ISOM JAPT)
Sprint 10 x 80m
Passive torque & blood collection
Sprint 10 x 80m

15. Results - Architecture
P<0.001
P>0.05

16. Results - Architecture
P>0.05
P<0.001

17. Results - Architecture
P>0.05

18. Results – ISOM JAPT
P>0.05 P>0.05

19. Results - NeSt
P>0.05

20. Results - Recovery
P>0.05

21. Results - Recovery
P>0.05P>0.05

22. Results - Recovery
P>0.05 P>0.05

23. Research Questions
Do adaptations induced by eccentric training, in comparison with
concentric training, result in better maintenance of sprint performance
between sessions with reduced markers of muscle damage?
Does hamstring architecture affect isometric JAPT?
X
X

24. Results - recovery
Sprint session
1
Sprint session
2
Eccentric
training
Concentric
training
BUT…

25. Strength change (Nm/kg)
Fasciclelengthchange(cm)
Strength and structural changes

26. @duhigs