Lafuente M Pilar, Provis Laura, Schmalz Emily Anne
Department of Clinical Sciences and Services, Royal Veterinary College, Hatfield, UK.
Vet Rec. 2019 Jan 12;184(2):64. doi: 10.1136/vr.104946. Epub 2018 Nov 19.
The study aimed to compare the effect of restrictive and non-restrictive harnesses on shoulder extension of dogs at walk and trot. This was a prospective study of nine dogs. Dogs were walked and trotted on a treadmill at a comfortable walking and trotting speed, first with no harness, then with each harness type, with and without added weights. Dogs were filmed and the angle of shoulder extension was measured using non-reflective markers and a video analysis software. Significant decrease in shoulder extension was found with both types of harnesses in comparison with no harness, except for the restrictive harness with weights. Shoulder extension was 2.6° and 4.4° less in dogs wearing a non-restrictive harness than in dogs wearing a restrictive harness, at walk and trot, respectively. The addition of weights did not consistently add more restriction to shoulder extension. The results of this study indicate that harnesses do limit shoulder extension, but perhaps not in the way originally anticipated, as results show extension is significantly reduced under the non-restrictive harnesses compared with the restrictive harnesses, with and without weights.
该研究旨在比较限制性和非限制性挽具对犬在行走和小跑时肩部伸展的影响。这是一项对9只犬的前瞻性研究。犬在跑步机上以舒适的行走和小跑速度行走和小跑，首先不使用挽具，然后依次使用每种挽具类型，同时添加和不添加重量。对犬进行拍摄，并使用非反光标记和视频分析软件测量肩部伸展角度。与不使用挽具相比，两种类型的挽具均导致肩部伸展显著减少，但添加重量的限制性挽具除外。在行走和小跑时，佩戴非限制性挽具的犬的肩部伸展分别比佩戴限制性挽具的犬少2.6°和4.4°。添加重量并没有始终如一地增加对肩部伸展的限制。本研究结果表明，挽具确实会限制肩部伸展，但可能并非如最初预期的那样，因为结果显示，无论是否添加重量，与限制性挽具相比，非限制性挽具下的伸展显著减少。
