Self-selected recreational exercise has no impact on early postpartum lactation-induced bone loss

Little, Kathleen D.; Clapp, James F.

doi:10.1249/00005768-199806000-00009

Cited by 3 publications

(11 citation statements)

References 19 publications

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“…Before admission into the study, all women obtained medical clearance from their physician. Sample size was calculated on the basis of changes in lumbar spine BMD reported by Little and Clapp (13). Calculations estimated that a final sample size of 20 (10 per group) would provide significant power to detect a 10% difference in change in BMD between groups.…”

Section: Methodsmentioning

confidence: 99%

Effect of Exercise Training on Loss of Bone Mineral Density during Lactation

Lovelady

Bopp

Colleran

et al. 2009

Medicine &Amp; Science in Sports &Amp; Exercise

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Section: Methodsmentioning

confidence: 99%

Effect of Exercise Training on Loss of Bone Mineral Density during Lactation

Lovelady

Bopp

Colleran

et al. 2009

Medicine &Amp; Science in Sports &Amp; Exercise

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“…Although the results of these studies are of interest, clinical trials (particularly randomly assigned trials) provide more scientifically interpretable results. Because of concerns that exercise might impair breast milk quantity or quality, most of the clinical cross‐sectional (18,19) and randomized trials (20,21,22) conducted over the last ∼12 years have investigated the effect of postpartum exercise on weight retention and/or energy balance in lactating women. Only a few have addressed this question in nonlactating (bottle‐feeding) mothers (23,24), who make up the majority (71%) at 6 months postpartum (25).…”

Section: Postpartum Exercise and Body Weight Body Composition And Ementioning

confidence: 99%

Effect of Postpartum Exercise on Mothers and their Offspring: A Review of the Literature

Larson-Meyer

2002

Obesity Research

105

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LARSON-MEYER, DAWNINE ENETTE. Effect of postpartum exercise on mothers and their offspring: a review of the literature. Obes Res. 2002;10:841-853. Epidemiological studies suggest that childbearing may contribute to the development of obesity. In the past 12 years, several cross-sectional and randomized trials have addressed the effect of postpartum exercise on weight loss and/or energy balance in mostly lactating women. These studies suggest that moderate exercise without specific calorie restriction does not promote greater weight or fat loss. This may be because exercise may promote greater energy intake and/or reduced energy expenditure from nonexercise physical activity (thus preventing negative energy balance), but further research is needed. Regular exercise, however, is likely to have other important health benefits after childbirth. A few published studies suggest that postpartum exercise improves aerobic fitness, high-density lipoprotein-cholesterol levels, and insulin sensitivity. Exercise may also enhance psychological well-being, but controlled clinical studies are needed. Although two published studies have addressed whether exercise training attenuates lactationinduced bone loss, better controlled studies are needed to determine whether postpartum weight-bearing exercise can improve bone mineral density in lactating and nonlactating women alike. In lactating women, several studies have collectively determined that neither acute nor regular exercise has adverse effects on a mother's ability to successfully breast-feed. It needs to be determined whether a woman's participation in regular exercise after childbirth will improve her ability to mother or instill lifetime habits of regular physical activity in either herself or her offspring. Overall, published studies have established the importance of regular exercise during the postpartum period. More research, however, is needed in this important area.

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Section: Effects On Breast Feedingmentioning

confidence: 99%

“…The profound detrimental effects of lactation on maternal bone density are due to prolonged estrogen deficiency, compounded with calcium loss in excess of 200 to 400 mg/d [44]. In addition, significant axial bone loss of over 3% occurs after only 3 to 4 months of lactation [45], in response to the lactationinduced calcium loss and estrogen deficiency [44]. Although exercise has been found to enhance bone mineralization due to mechanical forces and muscular contraction, self-selected recreational exercise had no impact on early (3 months) postpartum lactation-induced bone mineral loss [44].…”

Section: Effects On Breast Feedingmentioning

confidence: 99%

“…In addition, significant axial bone loss of over 3% occurs after only 3 to 4 months of lactation [45], in response to the lactationinduced calcium loss and estrogen deficiency [44]. Although exercise has been found to enhance bone mineralization due to mechanical forces and muscular contraction, self-selected recreational exercise had no impact on early (3 months) postpartum lactation-induced bone mineral loss [44]. However, in a longitudinal study examining calcium homeostasis and spinal trabecular bone loss during pregnancy and lactation, spinal bone mineral was recovered upon resumption of menses in postpartum women [46].…”

Section: Effects On Breast Feedingmentioning

confidence: 99%

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Exercise in the Postpartum Period

Mottola

2002

Current Sports Medicine Reports

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Pregnancy, birth, and the postpartum period are important events in the reproductive lives of women. Exercise guidelines exist for pregnancy, but recommendations for exercise during the postpartum period are virtually nonexistent. It is important to examine the theoretic concerns and potential benefits of exercise during this period, especially with respect to weight retention following pregnancy, lactation performance, and infant growth. It is recommended to increase the definition of the postpartum period to 1 year, because many physiologic changes due to pregnancy remain up to 1 year after delivery. Evidence-based guidelines are presented for postpartum exercise and lactation. Future research should address the impact of exercise and lactation on bone mineral density, nutrition status and weight loss, cardiovascular health, and how to optimize health promotion during the postpartum period.

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Self-selected recreational exercise has no impact on early postpartum lactation-induced bone loss

Cited by 3 publications

References 19 publications

Effect of Exercise Training on Loss of Bone Mineral Density during Lactation

Effect of Exercise Training on Loss of Bone Mineral Density during Lactation

Effect of Postpartum Exercise on Mothers and their Offspring: A Review of the Literature

Exercise in the Postpartum Period

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