Hederstedt Sandra, McGowan Catherine, Essner Ann
AniCura Falu Djursjukhus, Samueldalsvägen 2B, SE-791 61 Falun, Sweden.
School of Veterinary Science, The University of Liverpool, Leahurst Campus, Chester High Road, Neston, Wirral CH64 7TE, UK.
Animals (Basel). 2021 Jul 2;11(7):1983. doi: 10.3390/ani11071983.
Physical fitness is required for canine athletes and working dogs to optimize performance in various disciplines. There is a lack of research on the effects of resistance exercise on cardiorespiratory variables in dogs. The aim of this study was to investigate the immediate effects of parachute-resisted (PR) gallop on heart rate, running speed and stride frequency compared to unresisted (UR) gallop in dogs. Five N-of-1 trials RCTs with alternating interventions were implemented. Dogs ran on a 200 m course with and without resistive force applied by a parachute attached to their harness while cardiac inter-beat intervals (IBI), running speed and stride frequency were measured. The results were visually displayed and interpreted in graphs and percentage of non-overlapping data estimated effect size. Both interventions showed large effects on heart rate compared to resting values. Mean IBI increased (10-17%) during PR gallop compared to UR gallop although this change was small relative to decreased running speed (19-40%) and increased stride frequency (18-63%). Minimum IBI showed no difference between interventions indicating similar maximum heartbeat per minute. In conclusion, parachute-resistance resulted in dogs galloping at lower speeds at the same cardiorespiratory level of intensity, which may be useful in canine physical rehabilitation and fitness training.
体能对于犬类运动员和工作犬在各项运动中优化表现至关重要。目前关于抗阻运动对犬类心肺变量影响的研究较少。本研究的目的是调查与无阻力（UR）疾驰相比，降落伞阻力（PR）疾驰对犬心率、奔跑速度和步频的即时影响。实施了5项采用交替干预的单病例随机对照试验（N-of-1试验RCT）。犬在200米的跑道上奔跑，佩戴的背带连接降落伞，分别在有阻力和无阻力的情况下进行，同时测量心脏搏动间期（IBI）、奔跑速度和步频。结果以图表形式直观呈现并进行解读，并通过非重叠数据百分比估计效应大小。与静息值相比，两种干预对心率均有较大影响。与UR疾驰相比，PR疾驰期间平均IBI增加（10 - 17%），尽管相对于奔跑速度降低（19 - 40%）和步频增加（18 - 63%）而言，这种变化较小。干预之间的最小IBI无差异，表明每分钟最大心跳数相似。总之，降落伞阻力使犬在相同心肺强度水平下以较低速度疾驰，这可能对犬类身体康复和体能训练有用。
