BACKGROUND The number of new world records has decreased substantially in most athletic events in recent years. There has been enormous growth in participation at Masters events, and older athletes have been competing at the highest levels with much younger athletes. However, the progression of athletic performance over time has not been well investigated in Masters athletes. OBJECTIVE AND ME...

High-intensity interval training (HIIT) improves peak power output (PPO) in sedentary aging men but has not been examined in masters endurance athletes. Therefore, we investigated whether a six-week program of low-volume HIIT would (i) improve PPO in masters athletes and (ii) whether any change in PPO would be associated with steroid hormone perturbations. Seventeen male masters athletes (60 ± ...

A recent increase in the number of masters athletes in the United States can be attributed to a growing population of more than 300 million people, an aging subpopulation of “baby boomers,” and a culture enamored with sports. To exemplify this increase, in 1987, the first National Senior Games had 2500 participants (all older than 50 years), which more than quadrupled to 10,100 participants in ...

Sex determination offers an opportunity to address many classic questions of developmental biology. In addition, because sex determination evolves rapidly, it offers an opportunity to investigate the evolution of genetic hierarchies. Sex determination in Drosophila melanogaster is controlled by the master regulatory gene, Sex lethal (Sxl). DmSxl controls the alternative splicing of a downstream...

some months ago published a series of Illustrations of Regional Anatomy of the human body, exclusive of the limbs. This Journal, in reviewing this work, expressed regret that the limbs had not been included in what was otherwise an admirable work. This defect has now been remedied by the present publication of two new parts to illustrate their dissection. We can add nothing further to our notic...

Full points can be obtained for correct answers to 8 questions. Each numbered question (which may have several parts) is worth 20 points. All answers will be graded, but the score for the examination will be the sum of the scores of your best 8 solutions. Use separate answer sheets for each question. DO NOT PUT YOUR NAME ON YOUR ANSWER SHEETS. When you have finished, insert all your answer shee...