How to Build Muscle in 9 Minutes
Briefly

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.
How do I know if my weights are heavy enough? Check your form. This workout involves many repetitions of the same exercise and you will know you are using the correct weight if your form stays consistent between the first part of a repetition set and the end.
Read at www.nytimes.com
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