Abstract
The purpose of this study was to measure the change in hamstring muscle thickness between contracting and relaxing conditions following a return to sports after a hamstring muscle strain and thereby evaluate muscle function. Six male track and field sprinters participated in this study. All had experienced a prior hamstring strain injury that required a minimum of 2 weeks away from sport participation. Transverse plane scans were performed at the following four points on the affected and unaffected sides under contracting and relaxing conditions: proximal biceps femoris long head, proximal semitendinosus, middle biceps femoris long head, and middle semitendinosus. The results demonstrated an increase in the thickness of the middle biceps femoris long head and middle semitendinosus regions on the unaffected side with contraction, whereas the affected side did not show a significant increase. The proximal semitendinosus muscle thickness was increased with contraction on both the unaffected and the affected sides. By contrast, the proximal biceps femoris muscle thickness did not show a significant increase on both sides. The results of this study show that evaluation of muscle thickness during contraction may be useful for assessing the change in muscle function after a hamstring muscle strain injury.
| Original language | English |
|---|---|
| Pages (from-to) | 63-67 |
| Number of pages | 5 |
| Journal | Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology |
| Volume | 2 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2015 Apr 1 |
| Externally published | Yes |
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Keywords
- after-effect
- muscle
- rehabilitation
- sports injury
ASJC Scopus subject areas
- Rehabilitation
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation
Cite this
Change in muscle thickness under contracting conditions following return to sports after a hamstring muscle strain injury - A pilot study. / Nagano, Yasuharu; Higashihara, Ayako; Edama, Mutsuaki.
In: Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology, Vol. 2, No. 2, 01.04.2015, p. 63-67.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Change in muscle thickness under contracting conditions following return to sports after a hamstring muscle strain injury - A pilot study
AU - Nagano, Yasuharu
AU - Higashihara, Ayako
AU - Edama, Mutsuaki
PY - 2015/4/1
Y1 - 2015/4/1
N2 - The purpose of this study was to measure the change in hamstring muscle thickness between contracting and relaxing conditions following a return to sports after a hamstring muscle strain and thereby evaluate muscle function. Six male track and field sprinters participated in this study. All had experienced a prior hamstring strain injury that required a minimum of 2 weeks away from sport participation. Transverse plane scans were performed at the following four points on the affected and unaffected sides under contracting and relaxing conditions: proximal biceps femoris long head, proximal semitendinosus, middle biceps femoris long head, and middle semitendinosus. The results demonstrated an increase in the thickness of the middle biceps femoris long head and middle semitendinosus regions on the unaffected side with contraction, whereas the affected side did not show a significant increase. The proximal semitendinosus muscle thickness was increased with contraction on both the unaffected and the affected sides. By contrast, the proximal biceps femoris muscle thickness did not show a significant increase on both sides. The results of this study show that evaluation of muscle thickness during contraction may be useful for assessing the change in muscle function after a hamstring muscle strain injury.
AB - The purpose of this study was to measure the change in hamstring muscle thickness between contracting and relaxing conditions following a return to sports after a hamstring muscle strain and thereby evaluate muscle function. Six male track and field sprinters participated in this study. All had experienced a prior hamstring strain injury that required a minimum of 2 weeks away from sport participation. Transverse plane scans were performed at the following four points on the affected and unaffected sides under contracting and relaxing conditions: proximal biceps femoris long head, proximal semitendinosus, middle biceps femoris long head, and middle semitendinosus. The results demonstrated an increase in the thickness of the middle biceps femoris long head and middle semitendinosus regions on the unaffected side with contraction, whereas the affected side did not show a significant increase. The proximal semitendinosus muscle thickness was increased with contraction on both the unaffected and the affected sides. By contrast, the proximal biceps femoris muscle thickness did not show a significant increase on both sides. The results of this study show that evaluation of muscle thickness during contraction may be useful for assessing the change in muscle function after a hamstring muscle strain injury.
KW - after-effect
KW - muscle
KW - rehabilitation
KW - sports injury
UR - http://www.scopus.com/inward/record.url?scp=85020864246&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85020864246&partnerID=8YFLogxK
U2 - 10.1016/j.asmart.2015.01.001
DO - 10.1016/j.asmart.2015.01.001
M3 - Article
VL - 2
SP - 63
EP - 67
JO - Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology
JF - Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology
SN - 2214-6873
IS - 2
ER -