Comparative study of muscle fiber type composition in the middle gluteal muscle of andalusian, thoroughbred and arabian horses

Lopez-Rivero, J.L.; Agüera, Estrella I.; Monterde, J. G.; Rodríguez-Barbudo, María V.; Miró, F.

doi:10.1016/s0737-0806(89)80072-3

Cited by 38 publications

(25 citation statements)

References 17 publications

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“…In addition, there have also been developments in techniques for differentiating the fibre types and the terminology used to describe them, all of which can make it difficult to compare directly across studies. All the studies, however, suggest that Arabians tend to have higher percentages of those fibre types that support ATP production primarily from aerobic rather than anaerobic pathways while the Thoroughbred tends to have more fibre types that can support ATP production via anaerobic means (Lopez-Rivero et al 1989;Snow 1993;Snow and Valberg 1994;Lopez-Rivero and Letelier 2000). In one recent review 87% of the cross sectional area of the gluteus muscle in elite endurance (Arabians and Arabian crosses) horses was occupied by types I and IIa fibres compared with 45% for the racehorses (Lopez- Rivero and Letelier 2000).…”

Section: Discussionmentioning

confidence: 99%

Comparison of the metabolic responses of trained Arabians and Thoroughbreds during high‐ and low‐intensity exercise

Prince

Geor

Harris³

et al. 2002

Equine Veterinary Journal

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In order to compare the metabolic responses to exercise in 2 similarly managed breeds of horses, 5 Arabian (AR) and 5 Thoroughbred (TB) horses, fed an identical diet with a similar diet and exercise training programme for the 2 preceding months, undertook 3 treadmill (3 degree incline) trials with a minimum of 7 days between tests: 1) an incremental test (MAX) for determination of aerobic capacity, V(LA4) and lactate threshold (LT; the percentage of VO2max when plasma lactate = 4 mmol/l); 2) a single high-speed exercise test (SPR) at 115% VO2max for estimation of maximal accumulated oxygen deficit (MAOD) and 3) a 90 min test at 35% VO2max (LO). VO2max (P<0.001) and running speed (P<0.05) at VO2max were higher in TB (mean +/- s.e. 154 +/- 3 ml/kg/min at 12.9 +/- 0.5 m/s) than in AR (129 +/- 2.5 ml/kg/min at 11.8 +/- 0.2 m/s). Total run time during MAX was greater (P<0.05) in TB (10.5 +/- 0.5 min) than in AR (93 +/- 0.3 min). However, V(LA4) and LT were not different between groups. Run time during SPR (TB 149 +/- 16; AR 109 +/- 11 s) and MAOD (TB 88 +/- 4; AR 70 +/- 6 ml O2/kg) were higher (P<0.05) in the TB group. During LO, FFA were higher (P<0.05) and the respiratory exchange ratio (RER) lower (P<0.05) in AR than in TB between 60 and 90 min, of exercise, indicating a greater use of fat for energy. These metabolic differences may reflect breed variation in muscle fibre types. However, further studies are needed to determine the mechanisms underlying the apparent breed differences in energy metabolism during exercise.

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Section: Discussionmentioning

confidence: 99%

Comparison of the metabolic responses of trained Arabians and Thoroughbreds during high‐ and low‐intensity exercise

Prince

Geor

Harris³

et al. 2002

Equine Veterinary Journal

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“…Variations in RER may reflect the effect of different factors involved in aerobic metabolism during exercise, in particular the breed, the training status and the duration and intensity of exercise (Lawrence, 1990). Due to their higher proportion of oxidative muscle fibers (Lopez-Rivero et al, 1989), Arabian horses present a better adaptation for fat metabolism during exercise, which yields to lower RER during submaximal exercise compared with those obtained in Thoroughbreds and Standardbreds . Moreover, by increasing oxidative capacity of the horse, physical training induces a decrease in the contribution of carbohydrate to EE and consequently a lower RER during moderate-intensity exercise .…”

Section: Field Cardio-respiratory Measurements In Arabian Endurance Hmentioning

confidence: 96%

Implementation of field cardio-respiratory measurements to assess energy expenditure in Arabian endurance horses

Goachet

Julliand

2015

Animal

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Measurements of respiratory exchanges in genuine exercise conditions are undoubtedly of interest to further define the energy needs of endurance horses. However, the equine K4b 2 , the gas exchanges portable device validated for equines, has not been used in Arabian endurance horses yet. Therefore, the objective of this study was to implement field cardio-respiratory measurements in such horses using the equine K4b 2 in order to assess energy expenditure (EE). Measurements of heart rate (HR), oxygen uptake (VO 2 ), carbon dioxide production (VCO 2 ), respiratory frequency (RF), tidal volume (VT) and minute expired volume (VE) were carried out at rest and during a 20-min submaximal incremental field exercise in five trained Arabian endurance horses equipped with the K4b 2 system. The relationship between HR and VO 2 was determined for each horse. EE of the exercise session was calculated from direct VO 2 measurements and individual HR-VO 2 regression. Out of the five horses, four tolerated the equipment. Respiratory and metabolic variables at rest and during exercise, as well as EE measured at the different gaits, were consistent with reported values in exercising horses: VO 2 ranged from 4.8 to 54.1 ml/min per kg from rest to canter, respectively, and EE from 82 to 1095 J/min per kg BW. The 20-min exercise session EE accounted for 6258 and 6332 J from direct VO 2 measurements and individual HR-VO 2 regression, respectively, which did not differ significantly. Providing an adaptation period and several technical adjustments, the present equine K4b 2 could be used to assess EE in Arabian endurance horses in a controlled environment. The prediction of EE from the individual VO 2 -HR relationship might be an alternative method to evaluate EE when VO 2 measurements are not possible.

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“…In equine sports medicine, certain inter‐breed differences have been reported in muscle fibre patterns (López‐Rivero et al., 1989) and various physiological parameters (Castejón et al., 1994) as a function of different sports undertaken and the degree of training. Galisteo et al.…”

Section: Introductionmentioning

confidence: 99%

Inter‐Breed Differences in Equine Forelimb Kinematics at the Walk

Galisteo¹,

Morales

Miró

et al. 2001

Journal of Veterinary Medicine Series A

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Linear, temporal and angular biokinematic characteristics of the forelimb at the walk in different breeds were determined, highlighting inter-breed differences. Twenty-three healthy stallions were used: ten Andalusians (AN), seven Arabs (AR) and six Anglo-Arabs (AA). Height at the withers was significantly different between groups (P < 0.001). Six trials per horse were recorded using a levelled video camera (sampling frame rate 25 frames/s), digitized and analysed using a semi-automatic movement analysis system. No statistically significant differences in speeds were recorded between breeds (P > 0.05). The only temporal parameter which was similar in the three breeds was the moment at which the hoof reached the highest point in its trajectory. The variables presenting the most significant differences were the percentages of deceleration and propulsion within the stance phase. ANOVA for angular variables showed that the greatest difference was in the range of angular movement of the carpal joint, being higher in AN, due to a lower minimum value. In the fetlock joint, the greatest difference was observed in minimum values, which differed in all three breeds. Significant inter-breed differences were also observed for maximum limb retraction, being lowest in the AN group, followed by the AA and AR groups. This finding was reflected in the angular range of motion, despite smaller differences in the degree of limb protraction; very similar values were reported in all three breeds. As regards the elbow joint, no inter-breed differences were observed in terms of minimum values, whereas differences were recorded for maximum and angular range of motion, higher values being displayed by the AR and AN groups than by AA animals. In conclusion, inter-breed differences may be determined in equine forelimb biokinematics at the walk. This study distinguished between AN, AR and AA horses.

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Comparative study of muscle fiber type composition in the middle gluteal muscle of andalusian, thoroughbred and arabian horses

Cited by 38 publications

References 17 publications

Comparison of the metabolic responses of trained Arabians and Thoroughbreds during high‐ and low‐intensity exercise

Comparison of the metabolic responses of trained Arabians and Thoroughbreds during high‐ and low‐intensity exercise

Implementation of field cardio-respiratory measurements to assess energy expenditure in Arabian endurance horses

Inter‐Breed Differences in Equine Forelimb Kinematics at the Walk

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