We all want simple workouts that deliver results, and that's why the 21-15-9 format has become a staple in high-intensity functional fitness. Originally a CrossFit workout, it involves completing one ...

CrossFit builds strength, endurance, and skill, and is a great way to workout, trainers and coaches told Insider. To build muscle and lose fat, bodybuilding training is usually optimal, personal ...

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This is an installment of Good Fit, a column about exercise. I took my first CrossFit Kids class when I was 10 years old, the summer between fifth and sixth grade. I remember a circuit that involved ...