Around the world, scientists are peering into microscopes and reviewing data. Some are observing world-class athletes as they sprint to the finish line. Others are experts on functional fitness. They are devoted to making it easier for ordinary people to lift heavy boxes, run to catch the bus, and play with their dogs. In the lab, on the track, or in the backyard, these scientists are striving to understand the human body in new ways. The work they are doing is pushing science forward. And in the process, they are making us stronger, better, faster. Learn about the science of fitness while exploring STEM topics and learning fractions! This nonfiction reader seamlessly integrates the teaching of math and reading, and uses real-world examples to teach math concepts. Text features include images, a glossary, an index, captions, and a table of contents to build students' vocabulary and reading comprehension skills as they interact with the text. The rigorous practice problems, math charts and diagrams, and sidebars extend learning and provide multiple opportunities for students to practice what they have learned. The Math Talk section provides an in-depth problem-solving experience.