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Work-related stress has been associated with an increased risk of hypertension and more severe cardiovascular problems in white men but has been less studied in women and black men. To determine whether the trait of high-effort coping (John Henryism) was related to higher blood pressure during work and laboratory challenges, we studied a biracial sample of 72 men and 71 women working full time outside the home who underwent ambulatory blood pressure monitoring for one 8-hour workday. This was followed by laboratory monitoring of blood pressure during resting baseline and five brief stressors. Women who were high-effort copers and had high status jobs had higher diastolic pressures at work and in the lab than other women; their pressure levels did not differ from those of men, but other women had lower pressures than men. In blacks, the same combination of high-effort coping plus high job status …