Changes in physiological parameters in healthy dogs on an underwater treadmill when the water level is set at the hip...

Understanding internal and external loading in exercise is important for safe rehabilitation. The physiological parameters of dogs have been studied in swimming, but those of dogs walking on an underwater treadmill have not been documented. In this study, four healthy beagle dogs were examined for changes in physiological parameters before and after walking in water for 20 min at a speed of 4 km/h with the water level set at the height of the hip joint as an external load. Statistical analysis of the results was performed using paired sample t-tests. Results indicated that heart rate (125 ± 11.8 beat/min to 163 ± 9.5 beat/min) and lactate levels (2 ± 0.1 mmol/L to 2.4 ± 0.2 mmol/ L) significantly increased from before to after walking on an underwater treadmill. Additional research is needed on internal loading when using underwater treadmills, which would further contribute to the safety of rehabilitation.