Interval exercise alters feed intake as well as leptin and ghrelin concentrations in Standardbred mares

Gordon, M. E.; McKeever, Kenneth H.; Bokman, Stephen H.; Betros, Cynthia L.; Manso-Filho, HC; Liburt, N.R.; Streltsova, J.

doi:10.1111/j.2042-3306.2006.tb05611.x

Cited by 27 publications

(17 citation statements)

References 51 publications

(29 reference statements)

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“…Exercise had a rapid effect on the levels of these two hormones, but their levels returned to the baseline levels soon after the cessation of exercise. Our findings are in agreement with previous publications (Broom et al 2007;Gordon et al 2006) which showed that exercise reduces the level of acylated ghrelin. Our most interesting finding was that the level of acylated ghrelin during exercise was negatively correlated with the level of leptin at baseline and after exercise.…”

Section: Discussionsupporting

confidence: 96%

“…Some studies found that exercise had Eur J Appl Physiol (2011) 111:809-817 813 no effect on ghrelin (Kraemer and Castracane 2007;Kyriazis et al 2007), but most of those studies measured total ghrelin concentration, which included both acylated and desacylated forms (Foster-Schubert et al 2005;Kyriazis et al 2007). More recent studies which measured acylated ghrelin found that exercise reduced the level of acylated ghrelin (Broom et al 2007;Gordon et al 2006). Our results with young and middle-aged rats are compatible with these more recent studies.…”

Section: Discussionmentioning

confidence: 97%

“…Acute exercise may increase (Gordon et al 2006), decrease (Gordon et al 2007), or not affect leptin levels (Sari et al 2007;Kyriazis et al 2007). The possible reason of these different results may be due to the time points to check leptin levels which could be during exercise, couples of minutes after exercise, or even several hours later.…”

Section: Discussionmentioning

confidence: 97%

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Aging effects on exercise-induced alternations in plasma acylated ghrelin and leptin in male rats

et al. 2010

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Ghrelin and exercise have been known to stimulate the release of growth hormone which is related to the glucose metabolism. However, the age effects of exercise on ghrelin in energy consumption remain unclear. Young (3 month old) and middle-aged (12 month old) Sprague-Dawley male rats were overnight fasted, and then randomly partitioned into exercise and control groups. Exercise groups swam for 20 min in 25°C water. Rats immersed in 25°C water for 20 min were used as control animals. All blood samples were collected before and 10, 20, 30, and 60 min after initiation of exercise via the right jugular vein. Our results indicated that the swimming regimen decreased the secretion of acylated ghrelin and insulin, but increased the secretion of leptin, lactate, and glucose. In addition, exercise significantly amplified the inverse correlation between leptin and acylated ghrelin (r < -0.6) in middle-age group. Both the above findings were not emphasized in related articles before. Moreover, the time courses of these changes were slightly different in young and middle-aged rats. In basal metabolic characteristics, body weight and the plasma lactate, glucose, insulin, and leptin are higher in middle-age group than that in young group. In conclusion, compared with young rats, middle-aged rats have higher basal body weight, plasma glucose, insulin, and leptin, but age had no effect on the level of plasma acylated ghrelin. A 20-min exercise regimen decreased acylated ghrelin and increased leptin with inverse correlation between them which was strengthened during exercise, but were not influenced by age.

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Section: Discussionsupporting

confidence: 96%

Section: Discussionmentioning

confidence: 97%

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Aging effects on exercise-induced alternations in plasma acylated ghrelin and leptin in male rats

et al. 2010

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“…Gordon et al (2007b) only noted a decrease in the plasma leptin concentration 24 h after Standardbred mares had been exercised. Gordon et al (2006) and , however, have reported an increase in plasma leptin concentration observed just after Standardbred horses had been exercised. The reason for this diversity in the exercise-induced response of the plasma leptin concentration is still not explained.…”

Section: Discussionmentioning

confidence: 92%

“…The ratio of changes in these hormones levels depends, however, on the intensity and duration of the performed exercise (Snow et al, 1992;Desmecht et al, 1996;Gordon et al, 2007b). In exercised horses, all variations (increase, decrease or any change) in plasma leptin values have been described (Gordon et al, 2006 and2007b;. Leptin secretion during exercise is an especially interesting aspect of research because this hormone is involved in the processes of energy production and expenditure.…”

Section: Introductionmentioning

confidence: 99%

Changes in plasma leptin concentration during different types of exercises performed by horses

Kędzierski

2014

Animal

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Leptin is a tissue-derivative adipokine that regulates appetite, food intake and energy expenditure. It is still not clear how exercise affects plasma leptin concentration in horses. The aim of this study was to evaluate the influence of exercise intensity and duration on plasma leptin levels in working horses. A total of 38 horses were prospectively included in the study and grouped according to the type of exercise they performed: dressage (six stallions, group D), jumping (12 stallions, group J), race (12 Thoroughbred horses, six stallions and six mares, group R) and harness (10 light draft stallions, group H). Blood samples were taken both before and after routine exercise (immediately after the exercise, 30 min and 24 h after). Blood lactic acid (LA) and plasma concentration of leptin, cortisol, uric acid, triacylglycerols, glycerol and free fatty acids were determined. Immediately after exercise, group R had the highest level of LA, whereas groups D and J had the lowest levels. A significant increase in plasma leptin concentration was stated only in group H in samples taken immediately after the end of the exercise period and 30 min after the exercise period, as compared with the values obtained at rest. A significant increase in plasma cortisol concentration was found immediately after the end of the exercise period in groups R and H. Leptin exercise-to-rest ratio was significantly correlated with cortisol exercise-to-rest ratio (r = 0.64; P < 0.001). The increase in plasma leptin concentration in exercised horses was related to the increased plasma cortisol concentration and took place only during long-lasting exercise, which was not intensive.Keywords: cortisol, leptin, horse, exercise ImplicationsLeptin is an adipokine that regulates energetic metabolism, appetite and food intake in mammals. The effect of exercise on plasma leptin concentration in horses is still not clear. The results of the present study indicate that some kinds of exercise increase the plasma leptin level in horses. Better understanding of the regulation of leptin release during exercise could contribute towards improving the performance and state of health of exercising horses; it is thus clear that detailed knowledge of improving the performance of trained horses will have an economic importance. The data presented in this study have never been published elsewhere.

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Pathophysiology of Gastric Ulcer Disease

Murray¹

2017

The Equine Acute Abdomen

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Interval exercise alters feed intake as well as leptin and ghrelin concentrations in Standardbred mares

Abstract: More research is needed to determine if there is a relationship between alterations of these hormones and changes in FI in horses that lose weight while in training.

Cited by 27 publications

References 51 publications

Aging effects on exercise-induced alternations in plasma acylated ghrelin and leptin in male rats

Aging effects on exercise-induced alternations in plasma acylated ghrelin and leptin in male rats

Changes in plasma leptin concentration during different types of exercises performed by horses

Pathophysiology of Gastric Ulcer Disease

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