https://www.nytimes.com/interactive/2017/well/move/guide-muscle.html

Want to get strong, but don’t have time for a gym? Strength training is key for increasing flexibility, reducing injury risk and maintaining an overall healthy body. The best part is that it doesn’t have to take long. Here we’ll teach you a simple nine-minute-long strength training program that you can complete in your own home. All you need is a set of dumbbells (or another type of weight), a clock and the goal of building a stronger body….

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