Reliability of an incremental exercise test to evaluate acute blood lactate, heart rate and body temperature responses i
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ORIGINAL PAPER
Reliability of an incremental exercise test to evaluate acute blood lactate, heart rate and body temperature responses in Labrador retrievers Luca Ferasin · Samuele Marcora
Received: 2 January 2009 / Revised: 22 April 2009 / Accepted: 30 April 2009 / Published online: 20 May 2009 © Springer-Verlag 2009
Abstract Thirteen healthy Labrador retrievers underwent a 5-stage incremental treadmill exercise test to assess its reliability. Blood lactate (BL), heart rate (HR), and body temperature (BT) were measured at rest, after each stage of exercise, and after a 20-min recovery. Reproducibility was assessed by repeating the test after 7 days. Two-way MANOVAs revealed signiWcant diVerences between consecutive stages, and between values at rest and after recovery. There was also a signiWcant reduction in physiological strain between the Wrst and second trial (learning eVect). Test reliability expressed as typical error (BL = 0.22 mmol/l, HR = 9.81 bpm, BT = 0.22°C), coeYcient of variation (BL = 19.3%, HR = 7.9% and BT = 0.6%) and test–retest correlation (BL = 0.89, HR = 0.96, BT = 0.95) was good. Results support test reproducibility although the learning eVect needs to be controlled when investigating the exerciserelated problems commonly observed in this breed. Keywords collapse
Dogs · Canine · Treadmill · Exercise-induced
Communicated by G. Heldmaier. L. Ferasin College of Veterinary Medicine, University of Minnesota, St Paul, MN, USA S. Marcora School of Sport, Health and Exercise Sciences, Bangor University, Gwynedd, Wales, UK e-mail: [email protected] L. Ferasin (&) 10 Brambridge House, Kiln Lane, Eastleigh, Hampshire SO50 6HL, UK e-mail: [email protected]
Introduction Labrador retrievers represent the most common canine breed in the world (Wikipedia 2009). They are commonly used as pets, as well as working dogs in several activities, such as hunting, tracking/detection, disabled-assistance, and therapy work. Their ability to exercise is fundamental for successful performance of their tasks and exerciserelated problems can severely compromise the career of a dog even after a long and expensive period of training. Therefore, owners, trainers and veterinarians need objective parameters to assess the physical condition of these dogs. It is well known that exercise causes signiWcant acute responses in rectal temperature, pulse rate, blood lactate and other physiological parameters in healthy dogs (HinchcliV et al. 1993; Ilkiw et al. 1989; Matwichuk et al. 1999; Steiss et al. 2004). However, to the best of our knowledge, there are no available data that originate from standardized studies where test–retest reliability has been assessed. Furthermore, in the above-mentioned studies, most parameters were evaluated before and after intense exercise and did not evaluate the physiological responses that occur during exercise. Reproducible values originating from a validated test are necessary to meaningfully compare dogs and monitor the progress of individuals in response to training and clinica
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