Increased muscular efficiency during lactation in Colombian women

Article Abstract:

The muscular efficiency of lactating women is significantly higher than that of nonpregnant, nonlactating women, according to research undertaken between 1990 and 1995 on women living in Cali, Colombia. Possible sources of the increased energy required for successful lactation are decreased physical activity, increased food consumption, utilization of fat stores, reduced basal metabolic rate and an increased mechanical efficiency, allowing physical activity to take place at a reduced energy cost. Higher muscular efficiency brings significant advantages for lactating women, especially those whose dietary energy intake could be low.

Physiological aspects

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Vitamin K in breast milk: no influence of maternal dietary intake

Article Abstract:

The effects of dietary vitamin K intake and supplementation on breastmilk vitamin K1 concentration in 20 lactating mothers are presented. Results show that about 88 micrograms of maternal vitamin K1 oral supplementation did not significantly influence breastmilk vitamin K1 levels, which remained stable between five and 91 days of lactation. This was observed even when the vitamin K1 dose was significantly higher than the recommended dietary intake. Furthermore, maternal vitamin K1 supplementation did not result in significant higher levels of vitamin intake of infants.

Vitamin K

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The indirect association of lactation with subsequent perimenopausal body weight

Article Abstract:

A causal linkage between prior breastfeeding and perimenopausal body weight is not likely. The process of breastfeeding can not account for the strong negative association of breastfeeding to weight prior to reproductive experience. There may be an indirect relationship, however, between breastfeeding and subsequent body weight, involving dietary habits and exercise.

Research, Menopause, Body weight

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