The article chose review is “Effect of exercise training on loss of bone mineral density during lactation”. The purpose of this study was to determine whether exercise slows bone loss from four to twenty postpartum. The problem was that during lactation women move breast milk. After finishing breast feeding bone mass usually returns to pre pregnancy but not in all and this is the problem. The participants were healthy ,nonsmoking , sedentary ,exclusively breast feeding women with a body mass index of twenty to thirty kg.m.women were not allowed to join if they had cesarean delivery or if the exercise more than two days a week three months before. There were twenty participants all together. They all were cleared by a physician before participating. The instruments and test used for this experiment was for the body composition and bone density they used a dual-energy x-ray absorptiometry. For the assessment of cardio respiratory fitness and strength a sub maximal graded treadmill test was used. For the assessment of dietary intake by twenty four hour recall over the telephone using the nutrition data system for research software. For exercise intervention women were randomly assigned to either an EG or a CG. For the statistical analysis data were analyzed with JMP software. The testing procedures were with the body composition a whole- body was given three times a week and a step phantom were given one day a week .With the assessment cardio respiratory fitness and strength did sub maximal graded treadmill test were used. Exercise intervention used a complete sixteen week home based exercise program. The results were The EG lost a lot less LS BMD than CG. They were no great differences in total body and hip BMD. Both groups loss fat mass but, EG lost less lean body mass. Maximal strength increased by 34% to 221% for EG in the CG changed from -5.7% to 12%. “These results suggest that resistance and aerobic exercise may slow bone loss during lactation.
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