Improvement in running economy after 6 weeks of plyometric training.

This study determined whether a 6-week regimen of plyometric training would improve running economy (i.e., the oxygen cost of submaximal running).

FTIR investigation of the intermediates formed in the reaction of nitroprusside and thiolates.

We have studied the outer-sphere reduction of [Fe(CN)5(NO)]2- by several reagents including dithionite and have for the first time measured the IR spectra of [Fe(CN)5(NO)]3- and [Fe(CN)4(NO)]2- in aqueous media. The spectra of [Fe(CN)5(NO)]3- and [Fe(CN)4(NO)]2- are consistent with bent six-coordinate {MNO}7 and linear five-coordinate {MNO}7 species, respectively. We have measured the UV-visible and IR spectra that evolve after [Fe(CN)5(NO)]2- is reacted with thiolate.

Regular and inverse secondary kinetic enthalpy effects (KHE) for the rate of inversion of thioether and 1,1'-biisoquinoline complexes of ruthenium and osmium.

Thioether complexes with the formula Delta/Lambda-chloro(thioether)bis(2,2'-bipyridine)metal(II) (M = Ru, Os; thioether = dimethyl sulfide (3a(+)), diethyl sulfide (3b(+)), and tetrahydrothiophene (3c(+))) have been synthesized. The rates of inversion at the sulfur atom of the thioether ligands have been measured by spin-inversion transfer and line-shape NMR methods. In every case, the ruthenium derivative exhibits a faster inversion frequency at a given temperature than the corresponding osmium derivative.

Plasma creatine kinase responses of 18- to 30-yr-old African-American men to eccentric exercise.

Purpose: The primary aim was to describe the response of plasma creatine kinase (CK) activity in a sample of African-American men after a bout of eccentric exercise. The study also described signal intensity changes detected by MR in the musculature of the right lower leg.

Methods: Subjects were 20 male volunteers of African descent (age = 24 +/- 4 [mean +/- SD] yr).

The effect of ultrasound on collagen synthesis and fibroblast proliferation in vitro.

Ultrasound has been applied therapeutically to accelerate connective tissue healing although there is little direct scientific evidence to support its use. This investigation was conducted to determine the effects of ultrasound on the rate of collagen synthesis and cell proliferation using cultured fibroblasts derived from Achilles tendons of neonatal rats. Ultrasound (intensity = 0.