Favorable Effect of Voluntary Exercise on Bone Metabolism in a Rat Model of Ovariectomized Osteoporosis.

Omi, Naomi; Morikawa, Naomi; Hoshina, Aya; Igarashi, Chie; Ezawa, Ikuko

doi:10.4327/jsnfs.45.423

Cited by 5 publications

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“…Consistent aquatic exercise was one of the important factors for increasing daily physical activity, improving awareness of health and fitness in daily life, and preventing bone loss 6) . We also suggest that aquatic exercise is effective for increasing mechanical bone strength, mineral content of the femur, and BMD in the femur, tibia, and lumbar spine, in ovariectomized rats 8,33) . In our study, it is possible to say that some of the benefits of effective exercise in water include increased intestinal Ca absorption, heavier muscle weight, enhanced energy metabolism, and accelerated bone formation 33) .…”

Section: Effect Of Exercise In Water (Non-weight Bearing Exercise)mentioning

confidence: 69%

“…Change in bone-metabolic markers and/or hormone secretion by exercise might be effective in enhancing all bone sites thoughout the body. In addition to this, we reported that intestinal Ca absorption, energy metabolism, and volume of the skeletal muscles improved in voluntary running rats; therefore, a change in any of these factors was effective in enhancing bone mass and bone quality 21,22) . <Fig.…”

Section: Effect Of Weight Bearing Exercisementioning

confidence: 69%

“…Generally speaking, food intake of the voluntary running exercise group is much higher than that of the non-exercise group used as the control, because of the increased energy consumption in the voluntary running group 3,7,8,21,22) . Therefore, it is possible to say that improved bone metabolism, such as increased bone mass and/or intestinal Ca absorption, or prevention of bone loss, is not a result of physical activity; but might be due to an increase in Ca intake resulting from the increase in food intake of the exercise group.…”

Section: Effect Of Ca Intake and Physical Activitymentioning

confidence: 96%

“…We have reported that voluntary running exercise is effective in increasing bone mass in young and growing rats 3) , and for preventing bone loss in aged rats 21,22) and ovariectomized osteoporotic model rats 7,8,21,22) . And, bone strength is also increased through voluntary running exercise 3,7,8,21,22) . Mechanical loading contributes to an increase in bone strength in both sexes 23) .…”

Section: Effect Of Weight Bearing Exercisementioning

confidence: 99%

“…The mechanisms for bone metabolism improvement through weight bearing exercise have been evaluated, Correspondence: ominaomi@taiiku.tsukuba.ac.jp such as a change in the hormone secretion 25,26) , an occurrence of mechanical loading 27) , and an increase in intestinal Ca absorption 21) . Bone mass increases in response to mechanical loading and diminishes with unloading.…”

Section: Effect Of Weight Bearing Exercisementioning

confidence: 99%

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Influence of exercise and sports on bone

Omi

2014

JPFSM

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In general, exercise and/or sports are effective for bone health. Bone metabolism is influenced by several environmental factors, especially mechanical loading and nutrition. It is well known that the bone mass in athletes is higher than that of people having a sedentary lifestyle. Mechanical loading leads to an increase in bone mass, whereby it helps in strengthening. However, in some cases athletes might have lower bone mass. Insufficient dietary intake and an imbalanced nutritional status cause an inhibition of bone formation and activation of bone resorption. A higher than necessary Ca intake is important for improving bone metabolism. An adequate protein intake level, not too high or low, might be effective for bone maintenance. In addition, low energy availability could be leading to low bone mass. It might be possible to say that exercise is not effective for improving bone metabolism in an inadequate and/or imbalanced nutritional condition. A moderate level of physical activity, not an excess level, and appropriate nutrient intake are both necessary for bone health.

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Section: Effect Of Exercise In Water (Non-weight Bearing Exercise)mentioning

confidence: 69%

Section: Effect Of Weight Bearing Exercisementioning

confidence: 69%

Section: Effect Of Ca Intake and Physical Activitymentioning

confidence: 96%

Section: Effect Of Weight Bearing Exercisementioning

confidence: 99%

Section: Effect Of Weight Bearing Exercisementioning

confidence: 99%

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Influence of exercise and sports on bone

Omi

2014

JPFSM

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Effects of swimming and weight loading on bone density and mechanical properties of the mouse femoral bone

Hoshi

Watanabe

Chiba

et al. 1996

Environ Health Prev Med

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Effects of swimming and weight loading on femoral bone density and mechanical properties of the bone were investigated. ICR 8-week old female mice were divided into a swimming, weight-loading and control groups consisting 10 mice in each group. All mice were fed a standard diet and waterad libitum during the entire experiment. Body weight was significantly lower in the swimming group (p < 0.05) and the weight-loading group (p < 0.05) than in the control group, when the mean values were compared. The level of bone density was significantly higher (p < 0.05) in the weight-loading group than in the control group. As for the mechanical properties of the femur, there were no significant differences in the level of maximum breaking force, ultimate stress and elasticity between both the exercise groups and the control. Deformation, however, was significantly higher in both the exercise groups than in the control group. No significant difference in serum calcitonin was found between both the exercise groups and the control group. However, parathyroid hormone level had a tendency to be higher in the weigbt-loading group than in the control group. These results suggest that the effect of exercise on bone was stronger in weight loading than in swimming. Key words: Swimming, Weight loading, Bone density, Mechanical properties of bone, Mice.

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The effect of ovariectomy on bone metabolism in rats

Ezawa

1995

Bone

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Favorable Effect of Voluntary Exercise on Bone Metabolism in a Rat Model of Ovariectomized Osteoporosis.

Cited by 5 publications

References 0 publications

Influence of exercise and sports on bone

Influence of exercise and sports on bone

Effects of swimming and weight loading on bone density and mechanical properties of the mouse femoral bone

The effect of ovariectomy on bone metabolism in rats

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