Patterson-Kane J C, Firth E C, Parry D A, Wilson A M, Goodship A E
Department of Veterinary Clinical Sciences, Massey University, Palmerston North, New Zealand.
Am J Vet Res. 1998 Jan;59(1):64-8.
To determine the effect of a specific galloping exercise regimen on collagen fibril mass-average diameters (MAD) in the deep digital flexor tendon (DDFT) and suspensory ligament (SL) of young Thoroughbreds.
12 Thoroughbred fillies, 21 +/- 1 (mean +/- SD) months old.
6 horses underwent a specific 18-month treadmill training program involving galloping exercise. The remaining 6 horses served as controls, undertaking low-volume walking exercise over the same period. Sections were excised from the midpoint of the DDFT and SL, and small strips were dissected from central and peripheral locations for each structure. Fibril diameters were measured from micrographs of transverse ultrathin sections, using a computerized image analysis program. An MAD value was calculated for the central and peripheral regions of the DDFT and SL for each horse. Values for both regions were compared between exercised and control horses.
The MAD did not change significantly with exercise for either the DDFT or the SL.
Loading of the DDFT as a result of this exercise regimen was not sufficient to stimulate collagen fibril hypertrophy, in keeping with current data that indicate this tendon, compared with the SL and superficial digital flexor tendon (SDFT), is subjected to low loads. Microtrauma, in terms of reduction in fibril MAD, may have occurred in the SL at a site different from that sampled. Another possibility is that, between the trot and the gallop, loading of the SL does not increase to the same extent as that of the SDFT.
确定一种特定的疾驰运动方案对年轻纯种马指深屈肌腱（DDFT）和悬韧带（SL）中胶原纤维束质量平均直径（MAD）的影响。
12匹纯种马小母马，21±1（平均±标准差）月龄。
6匹马接受了一项为期18个月的特定跑步机训练计划，其中包括疾驰运动。其余6匹马作为对照，在同一时期进行低强度的步行运动。从DDFT和SL的中点切取切片，并从每个结构的中央和外周部位切取小条带。使用计算机图像分析程序从横向超薄切片的显微照片中测量纤维直径。计算每匹马DDFT和SL中央和外周区域的MAD值。比较运动组和对照组马匹两个区域的值。
DDFT和SL的MAD在运动后均未发生显著变化。
这种运动方案对DDFT的负荷不足以刺激胶原纤维肥大，这与目前的数据一致，即与SL和指浅屈肌腱（SDFT）相比，该肌腱承受的负荷较低。就纤维MAD的降低而言，微创伤可能发生在SL中与采样部位不同的部位。另一种可能性是，在小跑和疾驰之间，SL承受的负荷增加幅度与SDFT不同。
