Abstract
From a nutritional point of view, pregnancy and lactation are the most demanding physiological situations in a woman’s life. Requirements for all nutrients increase and optimal energy, and nutrient intake during pregnancy and lactation are basic for the actual and future health of both mother and child. Because successful pregnancy depends upon previous nutritional status of the mother, all women of childbearing age should be encouraged to consume a variety of nutrient-dense foods and beverages within and among the basic food groups while choosing foods that limit the intake of saturated and trans fats, cholesterol, added sugars, salt, and alcohol. Special attention must be paid to intake of micronutrients such as folic acid, vitamin D, iron, and iodine. A deficit in folic acid intake during the first 8 weeks of conception may lead to malformations (neural tube defects) which can be prevented by daily intake of 600 μg of folates from diet, supplements, or nutrient-enriched foods. Vitamin D deficiency among pregnant women can result from inadequate cutaneous synthesis, limited dietary intake of vitamin D, or vitamin D pathway impairment, and can lead to osteoporosis in the mother and/or rickets, hypocalcemia, delayed ossification, and abnormal enamel formation in the children as well as immune dysfunction. The DRI for vitamin D, during pregnancy and lactation, is 600 IU (15 μg)/day. There are not many natural foods rich in vitamin D so, apart from cold water fish, fortified foods are the main sources of this vitamin. Iron and iodine are also problematical nutrients which deficiencies are prevalent during gestation and lactation and so the need for their supplementation must be carefully evaluated. About energy, during pregnancy, women should consume an additional 300 kcal per fetus; however, women who are active during their pregnancy may need extra calories for exercise, and ideally, this additional energy should come from added servings of carbohydrate because carbohydrate intake meets the growth needs of the fetus and provides energy for exercise.
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Appendices
Appendix 1 Physical Activity Level Categories and Walking Equivalence
Walking equivalence (mi/day at 3–4 mph) | |||||
---|---|---|---|---|---|
PAL category | PAL range | PAL | Lightweight individual (44 kg) | Middleweight individual (70 kg) | Heavyweight individual (120 kg) |
Sedentary | 1.0–1.39 | 1.25 | ~0 | ~0 | ~ 0 |
Low active | 1.4–1.59 | ||||
Mean | 1.5 | 2.9 | 2.2 | 1.5 | |
Active | 1.6–1.89 | ||||
Minimum | 1.6 | 5.8 | 4.4 | 3.0 | |
Mean | 1.75 | 9.9 | 7.3 | 5.3 | |
Very active | 1.9–2.49 | ||||
Minimum | 1.9 | 14.0 | 10.3 | 17.5 | |
Mean | 2.2 | 22.5 | 16.7 | 12.3 | |
Maximum | 2.5 | 31.0 | 23.0 | 17.0 |
Appendix 2 Estimated Energy Expenditure* Prediction Equations at Four Physical Activity Levels
EER for infants and young children 0–3 years |
TEE (kcal/day) = 89 (±3 [standard error]) × weight of the child (kg) − 100 (±56 [standard error]) EER = TEE + energy deposition 0–3 months (89 × weight of infant [kg] − 100) + 175 (kcal for energy deposition) 4–6 months (89 × weight of infant [kg] − 100) + 56 (kcal for energy deposition) 7–12 months (89 × weight of infant [kg] − 100) + 22 (kcal for energy deposition) 13–36 months (89 × weight of child [kg] − 100) + 20 (kcal for energy deposition) Where PA = physical activity coefficient: PA = 1.0 if PAL is estimated to be ≥ 1.0 < 1.4 (sedentary) PA = 1.13 if PAL is estimated to be ≥ 1.4 < 1.6 (low active) PA = 1.26 if PAL is estimated to be ≥ 1.6 < 1.9 (active) PA = 1.42 if PAL is estimated to be ≥ 1.9 < 2.5 (very active) |
EER for girls 3–8 years |
TEE = see doubly labeled water data used to predict energy expenditure for standard error in the dietary reference intakes for energy, carbohydrate, fiber, fat, fatty acids, cholesterol, protein, and amino acids (macronutrients) at http://www.nap.edu/openbook.php?isbn=0309085373 EER = TEE + energy deposition EER = 135.3 − (30.8 × Age [years]) + PA × (10 × weight [kg] + 934 × height [m]) + 20 (kcal for energy deposition) Where PA = physical activity coefficient: PA = 1.0 if PAL is estimated to be ≥ 1.0 < 1.4 (sedentary) PA = 1.16 if PAL is estimated to be ≥ 1.4 < 1.6 (low active) PA = 1.31 if PAL is estimated to be ≥ 1.6 < 1.9 (active) PA = 1.56 if PAL is estimated to be ≥ 1.9 < 2.5 (very active) |
EER for girls 9–18 years |
TEE = see doubly labeled water data used to predict energy expenditure for standard error in the dietary reference intakes for energy, carbohydrate, fiber, fat, fatty acids, cholesterol, protein, and amino acids (macronutrients) at http://www.nap.edu/openbook.php?isbn=0309085373 EER = TEE + energy depositions EER = 135.3 − (30.8 × age [years]) + PA × (19 × weight [kg] + 934c height [m]) + 25 (kcal for energy deposition) Where PA = physical activity coefficient: PA = 1.0 if PAL is estimated to be ≥ 1.0 < 1.4 (sedentary) PA = 1.16 if PAL is estimated to be ≥ 1.4 < 1.6 (low active) PA = 1.31 if PAL is estimated to be ≥ 1.6 < 1.9 (active) PA = 1.56 if PAL is estimated to be ≥ 1.9 < 2.5 (very active) |
EER for women 19 years and older |
EER = 354 − (6.91 × age [years]) + PA × (9.36 × weight [kg] + 726 × height [m]) Where PA = physical activity coefficient: PA = 1.0 if PAL is estimated to be ≥ 1.0 < 1.4 (sedentary) PA = 1.12 if PAL is estimated to be ≥ 1.4 < 1.6 (low active) PA = 1.27 if PAL is estimated to be ≥ 1.6 < 1.9 (active) PA = 1.45 if PAL is estimated to be ≥ 1.9 < 2.5 (very active) |
EER for pregnant women (14–18 years) |
EER pregnant = adolescent EER nonpregnant + additional energy expended during pregnancy + energy deposition First trimester = adolescent EER + 0 + 0 Second trimester = adolescent EER + 160 kcal (8 kcal/week × 20 week) + 180 kcal Third trimester = adolescent EER + 272 kcal (8 kcal/week × 24 week) + 180 kcal |
EER for pregnant women (19–50 years) |
EER pregnant = adult EER nonpregnant + additional energy expanded during pregnancy + energy deposition First trimester = adult EER + 0 + 0 Second trimester = adult EER + 160 kcal (8 kcal/week × 20 week) + 180 kcal Third trimester = adult EER +272 kcal (8 kcal/week × 34 week) + 180 kcal |
EER for lactating women (14–18 years) |
EER lactation = adolescent EER prepregnancy + milk energy output − weight loss First 6 months = adolescent EER + 500 − 170 Second 6 months = adolescent EER + 400 − 0 |
EER for lactating women (19–50 years) |
EER lactation = adult EER prepregnancy + milk energy output − weight loss First 6 months = adult EER + 500 − 170 Second 6 months = adult EER + 400 − 0 |
Weight maintenance TEE in overweight girls 3–18 years or at risk of a high |
TEE = 389 − (41.2 × age [years]) + PA × (15.0 × weight [kg] + 701.6 × height [m]) Where PA = physical activity coefficient: PA = 1.0 if PAL is estimated to be ≥ 1.0 < 1.4 (sedentary) PA = 1.12 if PAL is estimated to be ≥ 1.4 < 1.6 (low active) PA = 1.24 if PAL is estimated to be ≥ 1.6 < 1.9 (active) PA = 1.45 if PAL is estimated to be ≥ 1.9 < 2.5 (very active) |
Overweight and obese women 19 years and older |
TEE = 448 − (7.95 × age [years]) + PA × (11.4 × weight [kg] + 619 × height [m]) Where PA is the physical activity coefficient: PA = 1.0 if PAL is estimated to be ≥ 1.0 < 1.4 (sedentary) PA = 1.16 if PAL is estimated to be ≥ 1.4 < 1.6 (low active) PA = 1.27 if PAL is estimated to be ≥ 1.6 < 1.9 (active) PA = 1.44 if PAL is estimated to be ≥ 1.9 < 2.5 (very active) |
Normal and overweight or obese women 19 years and older |
TEE = 387 − (7.31 × age [years]) + PA × (10.9 × weight [kg] + 600.7 × height [m]) Where PA is the physical activity coefficient: PA = 1.0 if PAL is estimated to be ≥ 1.0 < 1.4 (sedentary) PA = 1.14 if PAL is estimated to be ≥ 1.4 < 1.6 (low active) PA = 1.27 if PAL is estimated to be ≥ 1.6 < 1.9 (active) PA = 1.45 if PAL is estimated to be ≥ 1.9 < 2.5 (very active) |
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Robert-McComb, J.J., González, Á.G., Carraway, L. (2014). Nutritional Guidelines and Energy Needs During Pregnancy and Lactation. In: Robert-McComb, J.J., Norman, R.L., Zumwalt, M. (eds) The Active Female. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8884-2_31
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