244 Gait changes in the aging canine.

IF 2.9 2区农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of animal science Pub Date : 2025-10-05 DOI:10.1093/jas/skaf300.117

Claire L Timlin, Sarah M Dickerson, Fiona B Mccracken, Craig N Coon

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Abstract

With aging comes changes in gait and mobility in our companion animals. While aspects of these mobility changes have been quantified in humans, less have been identified in dogs. The aim of this retrospective data analysis was to identify age-related gait changes in Labrador Retrievers. Data collected in March of 2018 was available on 65 dogs, of which 34 had data collected again in August of 2024 and were at that time without known mobility issues based on kennel records. Of those 34 dogs, 16 (8 males, 8 females) had reached at least 10 years of age and were used in the final data analysis. Average age at the first data collection was 5.5 years old, and after the 6 year span average age increased to 11.9 years and body weights at this time averaged 31.8 ± 3.18 kg. Gait was analyzed using the Gait4Dogs system which measures spatial, temporal, and pressure variables for each limb. For each variable, the sum of the front limb or left limb values were divided by the sum of the hind limb or right limb values to generate the front:hind (H:R) or left:right (L:R) ratios, respectively. The average value for each gait variable was also calculated. Data were analyzed in SAS using a repeated measures mixed model with fixed effects of time. Age in 2018 was included as a covariate and type 1 sum of squares was performed. Sex was included as a random effect and dog as the repeated subject. We observed significant decreases in cadence, average step length, average stride length, and average swing percentage of cycle (P ≤ 0.05). Conversely, average step time, cycle time, swing time, stance percentage of cycle, and stance time all increased as dogs aged (P ≤ 0.05). Front:hind ratios for step time, cycle time, swing percentage of cycle, and swing time all decreased over time (P ≤ 0.01), while stance percentage of cycle and stance time F:H ratios increased (P ≤ 0.01). Overall, we observed that as Labrador Retrievers aged, they developed slower gaits with reduced step and stride lengths and a shift towards spending more time in the stance phase.

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244衰老犬的步态变化。

随着年龄的增长，我们的伴侣动物的步态和行动能力也会发生变化。虽然这些流动性变化的各个方面在人类中已经被量化，但在狗身上发现的却很少。本回顾性数据分析的目的是确定拉布拉多猎犬与年龄相关的步态变化。2018年3月收集了65只狗的数据，其中34只狗在2024年8月再次收集了数据，根据犬舍记录，当时没有已知的行动问题。在这34只狗中，16只（雄性8只，雌性8只）已经年满10岁，并被用于最终的数据分析。首次数据采集时平均年龄为5.5岁，6年后平均年龄增加到11.9岁，此时平均体重为31.8±3.18 kg。步态分析使用Gait4Dogs系统，该系统测量每个肢体的空间、时间和压力变量。对于每个变量，将前肢或左肢值之和除以后肢或右肢值之和，分别得到前肢：后（H:R）或左：右（L:R）比值。还计算了每个步态变量的平均值。在SAS中使用具有固定时间效应的重复测量混合模型分析数据。将2018年的年龄作为协变量，并进行类型1平方和。性别是随机影响因素，狗是重复的对象。我们观察到节奏、平均步长、平均步幅和平均周期摆动百分比显著降低（P≤0.05）。相反，平均步幅时间、周期时间、摇摆时间、周期站立百分比、站立时间均随年龄增长而增加（P≤0.05）。步进时间、周期时间、周期摆动百分比、摆动时间的前后比均随时间减小（P≤0.01），而周期站立百分比和站立时间F:H比均随时间增大（P≤0.01）。总的来说，我们观察到，随着拉布拉多猎犬年龄的增长，它们的步态变得更慢，步幅和步幅都减少了，并且在站立阶段花更多的时间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of animal science 农林科学-奶制品与动物科学

CiteScore

4.80

自引率

12.10%

发文量

1589

审稿时长

3 months

期刊介绍： The Journal of Animal Science (JAS) is the premier journal for animal science and serves as the leading source of new knowledge and perspective in this area. JAS publishes more than 500 fully reviewed research articles, invited reviews, technical notes, and letters to the editor each year. Articles published in JAS encompass a broad range of research topics in animal production and fundamental aspects of genetics, nutrition, physiology, and preparation and utilization of animal products. Articles typically report research with beef cattle, companion animals, goats, horses, pigs, and sheep; however, studies involving other farm animals, aquatic and wildlife species, and laboratory animal species that address fundamental questions related to livestock and companion animal biology will be considered for publication.