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And it can be more than know-how. A job might require a high level of physical fitness because of the danger involved. Sanford told Fox News that one company requires 34 pushups, followed by planking for 2.5 minutes. The potential employee has to lift arms and legs, one at a time and the chest cannot touch the floor. Right after that, an applicant has to climb a 16-inch step for three minutes without their heart rate going over 85 percent of the person's maximum.