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American astronaut Marsha Ivins demonstrates the effects of microgravity on her hair in space. The effects of spaceflight on the human body are complex and largely harmful over both short and long term. [1] Significant adverse effects of long-term weightlessness include muscle atrophy and deterioration of the skeleton (spaceflight osteopenia). [2]
A cleaning company has been fined $171,000 after federal investigators found 11 children working a "dangerous" overnight shift at a meat processing plant in Iowa.
The health consequences of shift work may depend on chronotype, that is, being a day person or a night person, and what shift a worker is assigned to. When individual chronotype is opposite of shift timing (day person working night shift), there is a greater risk of circadian rhythms disruption. [ 24 ]
Being underweight is an established [21] risk factor for osteoporosis, even for young people. This is seen in individuals suffering from relative energy deficiency in sport , formerly known as female athlete triad: when disordered eating or excessive exercise cause amenorrhea, hormone changes during ovulation leads to loss of bone mineral density.
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The effects of these images have also been linked to other problems among women including depression, obesity, and extreme dieting. [18] "The sociocultural etiological model is based on the premise that societal factors send powerful messages to girls and young women that certain physical attributes are unacceptable."
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