... application of conventional quality controlstandards to objective assessment of pulmonaryfunction in older subjects may prove difficult because of mood alterations, fatigability, lack of cooperation,or ... index de-scribes the relationship between force of contraction(Pdi/Pdimax) and duration of contraction (ratio of inspiratory time to total respiratory cycle duration[TI/TTOT]) and is related ... reticulum function and contractionduration in skeletal muscles of the rat. Am J Physiol1996;271:1032–40.[28] Balagopal P, Rooyackers O, Adey D, et al. Effects of aging on in vivo synthesis of skeletal...