The idea of “grit” is hot right now. Schools and businesses are taking up an emphasis on grit, the perseverance to get a job done. Often, Walter Mischel’s research is cited. He tested preschoolers ...

West Point cadets endure a grueling level of physical exertion, emotional challenge, and social abuse. The standards for completing the training are high, as is the dropout rate. According to ...

New FuelWise feature reminds you to eat and drink. Very granular sleep data. Light and comfortable. Hill Splitter tracks ascent and descent times and would be great for downhill sports. My favorite ...

There are many features and training tools to love on the Polar Grit X, especially the extra insights that trail and mountain athletes are going to benefit from, such as Hill Splitter, FuelWise and ...