Physiological Society

Insulin increases the uptake of glucose by the muscles, promotes the synthesis of glycogen, inhibits lipolysis and increases lipid synthesis; therefore it has been speculated that age-dependent changes in blood insulin concentration might influence metabolic characteristics. Supporting data are, however, not convincing. In one of the most comprehensive studies, Wirth et al (1978) determined the [...]

Muscle strength is a multifaceted, performance-related fitness component that is underpinned by muscular, neural and mechanical factors. The complex interaction of these components makes the study of the increase in muscle strength during growth and maturation challenging. The origins of the diversity in muscularity in adults occur early in fetal development, at approximately the fifth [...]