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The ectomorph, mesomorph, and endomorph categories can be useful as a simple way to describe general body shapes, but they should not be treated as fixed biological types.
People naturally have a wide range of body shapes and compositions, and many individuals do not fit neatly into one category. Genetics, age, hormones, muscle mass, physical activity, nutrition, sleep, and other factors all influence body composition and how someone responds to exercise and diet.
Rather than choosing a diet or training program solely according to an ectomorph, mesomorph, or endomorph
