Do Neuro-Muscular Adaptations Occur in Endurance-Trained Boys and Men?

Most research on the effects of endurance training has focused on endurance training's health-related benefits and metabolic effects in both children and adults. The purpose of this study was to examine the neuromuscular effects of endurance training and to investigate whether they differ in children (9.0-12.9 years) and adults (18.4-35.6 years). Maximal isometric torque, rate of torque development (RTD), rate of muscle activation (Q30), electromechanical delay (EMD), and time to peak torque and peak RTD were determined by isokinetic dynamometry and surface electromyography (EMG) in elbow and knee flexion and extension. The subjects were 12 endurance-trained and 16 untrained boys, and 15 endurance-trained and 20 untrained men. The adults displayed consistently higher peak torque, RTD, and Q30, in both absolute and normalized values, whereas the boys had longer EMD (64.7+/-17.1 vs. 56.6+/-15.4 ms) and time to peak RTD (98.5+/-32.1 vs. 80.4+/-15.0 ms for boys and men, respectively). Q30, normalized for peak EMG amplitude, was the only observed training effect (1.95+/-1.16 vs. 1.10+/-0.67 ms for trained and untrained men, respectively). This effect could not be shown in the boys. The findings show normalized muscle strength and rate of activation to be lower in children compared with adults, regardless of training status. Because the observed higher Q30 values were not matched by corresponding higher performance measures in the trained men, the functional and discriminatory significance of Q30 remains unclear. Endurance training does not appear to affect muscle strength or rate of force development in either men or boys.

Resilience in a Watershed Governance Context: A Primer

Watersheds are complex systems involving social, economic, and ecological dimensions that are constantly interacting and influencing each other, and governance of these systems involve a large and diverse cast of actors that add to the complexity and difficulty in deciding what is best for the watershed and people. Resilience thinking offers a way to understand and navigate the uncertainty, dynamics and complexity of watershed governance. This primer describes key ideas associated with resilience: more inclusive participation; building a shared understanding; inclusion of ecosystem services and functions in long-term planning; strong leadership; institutional and decision making flexibility; and, a decentralized system. This primer is an initial effort to translate the scholarly understanding of these key ideas and initiate a dialogue about their application in the context of watershed governance.

Letters to Reverend William Proudfoot, 1823, 1842-1843, 1846

A 2 ½ page letter addressed to The Editor of the Presbyterian Magazine, care of [illegible], London, C.W. The writer describes the Village of Chippawa and its location in Ontario. He writes that there are many people there of Scotch [Scottish] descent. He says that a congregation was formed and 39 names were on the roll. The letter is from J.P. [John Porteous] with an added note from Wm. Porteous. The letter is from St. Catharines. There is one postmark – St. Catharines, April 6, 1823 A 1 ½ page letter addressed to Rev. W. Proudfoot, Ed. Of Presbyterian Mag., London, C.W. This letter is from Walter Mitchell in St. Catharines. He sends a list of peoples’ names and the amounts that they have paid toward the Presbyterian Magazine. Mr. Mitchell is acting as an agent for the magazine. This letter has 1 postmark – St. Catharines, Sept. 13, 1842 A 2 page letter addressed to Rev. W. Proudfoot, London, C.W. This letter is from John Jennings of St. Catharines. The writer claims that he is ill but he makes plans to meet Reverend Proudfoot in Toronto in order to go to a meeting in Rochester. The writer expects that Reverend Proudfoot will preach in Rochester. The letter has 1 postmark – St. Catharines, Aug. 14, 1843. A 2 page letter addressed to The Rev. Professor Proudfoot, London, C.W. from John Porteaus of St. Catharines. The writer says that he will not preach in Detroit. He says that the people of Detroit are expecting Mr. Dalrymple [who was sent as a missionary to Canada from Scotland in 1846] and also, he doesn’t want to leave his congregation for 2 Sabbaths. The letter has 2 postmarks – St. Catharines, August 1846 [this postmark is very faint] and Hamilton, August 2, 1846.