Symptoms of lead poisoning are varied. They may affect many parts of the body. Most of the time, lead poisoning builds up slowly. It follows repeated exposures to small quantities of lead. Lead toxicity is rare after a single exposure or ingestion of lead.
The new formula for women, based on the new research, is 206 minus 88 percent of age. At age 50, the original formula gives a peak rate of 170 beats per minute for men and women. The new women's formula gives a maximum heart rate of 162 beats for women. Many men and women use their peak heart rate multiplied by 65 to 85 percent to determine their upper heart rate when exercising.
Myth: A normal heart rate is 60-100 beats per minute. That's the old standard. Many doctors think it should be lower. About 50-70 beats per minute is ideal, says Suzanne Steinbaum, MD, director of women's heart health at Lenox Hill Hospital. Recent studies suggest a heart rate higher than 76 beats per minute when you're resting may be linked to a higher risk of heart attack. The better shape you're in, the slower your heart rate will be when you're not moving around.