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Prescribing submaximal training based on the lactate threshold improved aerobic fitness in dogs with preclinical myxomatous mitral valve disease
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Abstract
Exercise intolerance may be a primary symptom of myxomatous mitral valve disease (MMVD) and a significant factor in reducing the quality of a dog’s life. Aerobic training effectively improves oxygen uptake and life expectancy in human patients with chronic heart failure. Lactate threshold (LT) is used to prescribe training programs. We conducted a study with dogs diagnosed with asymptomatic MMVD (stage B1), using the velocity corresponding to the visual lactate threshold (VLTv) and an eight-week submaximal training program (STP), three times a week, with each session lasting 30 min, to improve their aerobic fitness. The dogs were assigned into two groups: a healthy control group and a MMVD group (stage B1). The treadmill-based graded exercise test (GXT) was used to determine the lactate-velocity curve (LVC) inflexion point. We utilised the velocity corresponding to 70% VLTv as the external load STP, representing a training zone between 145 and 157 bpm. Before the STP, VLTv and maximum velocity (Vmax) were lower in B1 dogs compared with the healthy group. The VLTv increased in the B1 dogs, resulting in rightward shifts of the LVC. The VLT values for healthy dogs were 3.62 ± 0.90 m/s and 4.75 ± 0.6 m/s; for B1 dogs were 3.03 ± 0.6 m/s and 3.8 ± 0.75 m/s in the pre-STP and post-STP. The Vmax values were 4.50 ± 0.70 m/s and 4.75 ± 1.04 m/s for healthy dogs, and 4.0 ± 0.53 m/s and 4.66 ± 0.74 m/s for B1 dogs. In both groups, changes in the relationship between lactatemia and exercise work may indicate improvements in aerobic and anaerobic capacities. VLTv, as an external training loading, should be considered when prescribing tailored training programs for dogs with asymptomatic myxomatous mitral valve disease to improve their muscular and cardiovascular function and exercise tolerance.
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| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
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Prescribing submaximal training based on the lactate threshold improved aerobic fitness in dogs with preclinical myxomatous mitral valve disease
in Comparative Exercise PhysiologySearch for other papers by A.Z. Restan in
Current site
Google Scholar
PubMed
Search for other papers by F.K. Adams in
Current site
Google Scholar
PubMed
Search for other papers by A.P.P.A. Tristão in
Current site
Google Scholar
PubMed
Search for other papers by B.A. Loureiro in
Current site
Google Scholar
PubMed
Search for other papers by T. Sgarbiero in
Current site
Google Scholar
PubMed
Search for other papers by G.V. Ramos in
Current site
Google Scholar
PubMed
Search for other papers by M.G. Sousa in
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PubMed
Search for other papers by A.A. Camacho in
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PubMed
Search for other papers by G.C. Ferraz in
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PubMed
Abstract
Exercise intolerance may be a primary symptom of myxomatous mitral valve disease (MMVD) and a significant factor in reducing the quality of a dog’s life. Aerobic training effectively improves oxygen uptake and life expectancy in human patients with chronic heart failure. Lactate threshold (LT) is used to prescribe training programs. We conducted a study with dogs diagnosed with asymptomatic MMVD (stage B1), using the velocity corresponding to the visual lactate threshold (VLTv) and an eight-week submaximal training program (STP), three times a week, with each session lasting 30 min, to improve their aerobic fitness. The dogs were assigned into two groups: a healthy control group and a MMVD group (stage B1). The treadmill-based graded exercise test (GXT) was used to determine the lactate-velocity curve (LVC) inflexion point. We utilised the velocity corresponding to 70% VLTv as the external load STP, representing a training zone between 145 and 157 bpm. Before the STP, VLTv and maximum velocity (Vmax) were lower in B1 dogs compared with the healthy group. The VLTv increased in the B1 dogs, resulting in rightward shifts of the LVC. The VLT values for healthy dogs were 3.62 ± 0.90 m/s and 4.75 ± 0.6 m/s; for B1 dogs were 3.03 ± 0.6 m/s and 3.8 ± 0.75 m/s in the pre-STP and post-STP. The Vmax values were 4.50 ± 0.70 m/s and 4.75 ± 1.04 m/s for healthy dogs, and 4.0 ± 0.53 m/s and 4.66 ± 0.74 m/s for B1 dogs. In both groups, changes in the relationship between lactatemia and exercise work may indicate improvements in aerobic and anaerobic capacities. VLTv, as an external training loading, should be considered when prescribing tailored training programs for dogs with asymptomatic myxomatous mitral valve disease to improve their muscular and cardiovascular function and exercise tolerance.
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 562 | 119 | 27 |
| Gesamttextansichten | 14 | 7 | 0 |
| PDF-Downloads | 23 | 12 | 0 |
