The β-adrenergic receptors (β-AR) are present on the surface of almost every type of
mammalian cell. These receptors are stimulated physiologically by the neurotransmitter …

When the ratio of lean to fat deposition is improved, so is feed conversion efficiency. Net
benefits may include lower production costs, better product quality, less excretion of …

Athletes attempt to improve performance with drugs that act on the β‐adrenergic system
directly or indirectly. Of three β‐adrenoceptor (AR) subtypes, the β2‐AR is the main target in …

ing for anabolic steroids in this country. Many, if not most, of the new treatments are
advanced on the basis of conjecture and supposition alone. However, one recent and …

An experiment was conducted to determine the effect of ractopamine, energy intake, dietary
fat level, and sex on performance and carcass composition in finishing pigs. Three hundred …

β2‐Adrenoceptor agonists provide a potential therapy for muscle wasting and weakness, but
their use may be limited by adverse effects on the heart, mediated in part, by β1 …

Sympathetic hyperactivity (SH) is a hallmark of heart failure (HF), and several lines of
evidence suggest that SH contributes to HF-induced skeletal myopathy. However, little is …

Natural and xenobiotic compounds having sex‐related actions have long been used for
growth promotion and various changes in carcass quality in meat animals. The first …

Forty wether lambs were used in a 2× 4 factorial arrangement to determine the response of
animal performance, muscle growth, proteinase activity, and meat tenderness to β …

The molecular mechanisms underlying skeletal muscle mitochondrial adaptations induced
by aerobic exercise (AE) are not fully understood. We have previously shown that AE …