WASHINGTON - Staying active as you age is widely recommended, but what does a lifetime of physical change actually look like? How do strength, endurance and aerobic fitness evolve from youth to older ...

Scientists have studied human behavior change for decades, and there are hundreds of theoretical models designed to explain the many factors that influence decision making. My favorite model is the ...

So many aspects of life are dependent upon maintaining the best possible physical fitness, from performing one’s job at maximum efficiency to completing the myriad of other tasks faced each day. In ...