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The “crunch” for abdominal is the most popular ab exercise out there. When it comes to building a “six-pack” and losing belly fat, crunches are a must. This
How to properly cue for an abdominal crunch.
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Откройте секреты пресса: лучшие упражнения с подробными инструкциями и видеоуроками для идеальной фигуры, Fit&Healthy: Здоровый образ жизни и фитнес