Healthy Target Weights Thursday May 3, 2007 Healthy Target Weights Or What I’ve learned working with Eating Disordered Patients. Assessing Healthy Weight Sex Age Weight History Male--Age Adult Adolescent Child Adult Males Original Target Weight 1959 Metropolitan Life Insurance table—medium frame Metropolitan Life 1959 Table Healthy Weight for medium frame male 6’ would be 158-162 lb BMI of 21.7 (Target wts <BMI of 22) Does this work in Iowa? Male Adolescents and Children Goal weight is defined by the 50% BMI for age using the CDC growth chart. Goal weight will need reevaluation as the child or adolescent continues to grow. Growth Chart Developed by the National Center for Health Statistics Included BMI norms for the first time in 2000 Females--Age Adult—Geriatric? Adolescent Child Adult Females Original Target Weight for women with anorexia nervosa 1959 Metropolitan Life Insurance table—medium frame Original Target Weight for women with history of overweight 1983 Metropolitan Life Insurance table—medium frame Metropolitan Life 1959 Table Healthy weight for medium frame female 5’4” would be 122-126 for a BMI of 21.3 (Targets BMI of ~21) Does this work in Iowa? Metropolitan Life 1983 Table Healthy weight for medium frame female 5’4” would be 130-134 for a BMI of 22.7 (Targets BMI of ~23) Does this work in Iowa? Special Considerations How does “Rule of Thumb” compare to BMIs? “Rule of thumb” weight of 100 lb BMI of 19.5 Target weight for female 5’ is 107-111 lb. BMI of 21.3 Adult Females—Special Considerations Geriatric females (we have treated woman up to the age of 68 yrs) Do they need a different target? Female Adolescents and Children Goal weight will need reevaluation as the child or adolescent continues to grow. Goal weight for female children is defined by the 50% BMI for age using the CDC growth chart. Female Adolescents Target weight is set at a weight at which they have a 50% chance of onset of menses (for primary amenorrhea) or a 50% chance of return of menses (for secondary amenorrhea) according to Frisch and McArthur. Sexual maturity is more closely related to body weight than to chronological age. Minimal Weight for Height necessary for the onset or restoration of menses. Primary amenorrhea Secondary Amenorrhea (Menarche) Ht 10% 50% 10% 50% 5’2” 40.1 kg 46.2 44.9 51.5 5’4” 42.7 49.3 47.9 55.0 5’6” 44.5 51.4 49.9 57.3 5’8” 47.2 54.4 52.8 60.7 The increase of 5-6 kg between menarche and stable reproductive ability represent storage of energy to support a fetus and 3 months of lactation. The Frisch and McArthur table lends itself nicely into calculating BMIs. BMIs can be compared to the CDC Growth Chart Comparison of Bone Density Bone density scan of a Bone density scan of a 25- Bone density scan of a woman healthy 25-year-old woman year-old woman with anorexia in her 30’s with anorexia nervosa that has been nervosa that has been amenorrheal for 5 years amenorrheal for 15 years. Why is a Healthy Weight Important? Affects both physical and mental health. When does something become a mental illness?
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