Energy expenditure was measured in four geldings (433 to 520 kg) during submaximal exercise on a racetrack using a mobile open-circuit indirect respiration calorimeter. Total energy expended by the four horses walking, trotting, cantering was best described by the equation: Y = e3.02 + .0065X where Y = energy expended (cal X kg-1 X min-1) and X = speed (m/min).

Energy balance studies using indirect calorimetry were conducted with four mature equids ranging in weight from 125 to 856 kg. It was concluded that the maintenance requirements of equids vary linearly with body weight. The digestible energy (DE) requirement for equids confined to metabolism stalls was DE (kcal/d) = 975 + 21.28 X W where W equals body weight in kg.

Three standardbred horses were used in a 3×3 Latin square design trial to determine the effect of feeding diets containing different levels of carbohydrate, fat, and protein to exercise horses. Muscle and live glycogen concentrations were significantly lower after the long slow exercise test when the horses were fed high protein and high fat than fed the commercial sweet feed diet.

Energy balance studies using indirect calorimetry were conducted with four mature equids ranging in weight from 125 to 856 kg

Pagan, J.D. and H.F. Hintz. 1985. Energy expenditure in horses during submaximal exercise. In: Proc. 9th Equine Nutr. and Physiol. Soc. Symp. Michigan State University. pp. 182-187. This experiment was conducted to measure the amount of energy expended by horses traveling at speeds up to 400 m/minute on a racetrack both with and without a […]

Pagan, J.D., L.V. Soderholm and H.F. Hintz. 1984. The relationship of body weight and energy requirements in horses. In: Proc. Cornell Nutrition Conference for Feed Manufacturers. Cornell University. pp. 70-73.

Houpt, K.A., H.F. Hintz, and J.D. Pagan. 1983. Maternal-offspring bond of ponies fed different amounts of energy. Nutrition and Behavior 1:157-168. This study was designed to find the effect of varying the caloric level of the maternal diet during lactation on the response of 23 mares and their suckling foals to separation. Pony mares were […]

The National Research Council’s (1978) estimates of the energy requirements for lactation are based primarily on theoretical calculations. Some experiments have evaluated the accuracy of these recommendations (Jordan 1979; Sutton 1977), but in these studies not only was the digestible energy adjusted to different levels, but all of the other nutrients as well.