Physical Activity and Calcium Consumption Are Important Determinants of Lower Limb Bone Mass in Older Women

2004 ◽  
Vol 19 (10) ◽  
pp. 1634-1639 ◽  
Author(s):  
Amanda Devine ◽  
Satvinder S Dhaliwal ◽  
Ian M Dick ◽  
Jens Bollerslev ◽  
Richard L Prince
Keyword(s):  
Physical Activity ◽  
Bone Mass ◽  
Older Women ◽  
Lower Limb ◽  
Limb Bone

scholarly journals Protein consumption is an important predictor of lower limb bone mass in elderly women

2005 ◽  
Vol 81 (6) ◽  
pp. 1423-1428 ◽  
Author(s):  
Amanda Devine ◽  
Ian M Dick ◽  
Amirul FM Islam ◽  
Satvinder S Dhaliwal ◽  
Richard L Prince
Keyword(s):  
Bone Mass ◽  
Lower Limb ◽  
Elderly Women ◽  
Important Predictor ◽  
Limb Bone ◽  
Protein Consumption

Anabolic Hormones in Aging Women: Effects of Supplementation vs. Physical Activity

2004 ◽  
Vol 29 (1) ◽  
pp. 76-89 ◽  
Author(s):  
Jennifer L. Copeland
Keyword(s):  
Physical Activity ◽  
Bone Mass ◽  
Physical Function ◽  
Older Women ◽  
Hormone Replacement ◽  
Endocrine System ◽  
Anabolic Hormones ◽  
Age Related ◽  
Aging Women ◽  
Age Related Changes

Aging is associated with a decline in bone mass, muscle mass, strength, and physical function, and women are more likely to suffer from these physical changes than men. The model presented in this paper illustrates the age related changes in anabolic hormones and how this may partly explain the diminished physical function of older women. The model can also be used to identify potential sites of intervention that could delay the atrophy of the musculoskeletal system. Various pharmacological hormone therapies have been shown to be beneficial, but there may be health risks associated with their use. There is evidence that regular physical activity is related to higher levels of anabolic hormones in older persons, therefore exercise could be an alternative to drugs for slowing the age related changes in the endocrine system. However, some research suggests that the hormone response to exercise is blunted in older women. This lower hormonal response may not be a consequence of aging per se but instead may result from secondary characteristics of aging such as a decline in physical fitness and exercise intensity or changes in body composition. Further research is needed to determine whether exercise-induced increases in endogenous hormones have clinical significance in improving muscle or bone mass in aging women. Key words: hormone replacement therapy, exercise, sex steroids, growth hormone, IGF-I

scholarly journals Effect of L-citrulline, L-leucine, and multicomponent exercises on body compositions, physical activity, and amino acid concentrations in older Japanese women with low body mass index: A randomized double-blind placebo-controlled study

2021 ◽  
Author(s):  
Mijin Kim ◽  
Hiroko Isoda ◽  
Tomohiro Okura
Keyword(s):  
Physical Activity ◽  
Body Mass Index ◽  
Body Composition ◽  
Body Weight ◽  
Amino Acid ◽  
Bone Mass ◽  
Older Women ◽  
Body Mass ◽  
Low Body Mass Index ◽  
Amino Acid Concentrations

Abstract Background: The intake of citrulline (CIT) and leucine (LEU) can stimulate protein synthesis. However, the efficacy of the combined intervention of CIT and LEU intake with exercise on body composition and physical activity (PA) remains unclear. This study aimed to investigate the combined effect of CIT and LEU intake and weight-bearing exercises (WBE) and square stepping exercise (SSE) for 20 weeks on body composition, PA, and amino acid concentration in older women with low body mass index (BMI) (16 to 21 kg/m 2 ). Methods: A total of 23 participants practiced WBE and SSE once a week for 75 minutes and were administered supplement (Ex + CIT·LEU group: CIT 0.8 g and LEU 1.6 g; Ex + Placebo group: 3.5 g carbohydrate) twice a day for 20 weeks. Body composition was measured using dual-energy X-ray absorptiometry. PA, including leisure-time, household, and occupational PA, was assessed using the Physical Activity Scale for the Elderly. Amino acid concentrations in the blood were analyzed by high-performance liquid chromatography.Results: Significant interactions were observed in the body weight, BMI, lean mass, body mass, household and total PA, tyrosine, and phenylalanine. The within-group analysis showed that tyrosine of post-intervention measurement (Post) significantly in both groups ( p < 0.05). Body weight, BMI, lean mass, body mass, household PA, total PA, and phenylalanine of Post increased significantly in the Ex + CIT·LEU group ( p < 0.05). Additionally, significant positive correlations were observed between the intake rate of supplements and bone mass ( r = 0.80) and between the practice rate of WBE at home and bone mineral density ( r = 0.66) in the Ex + CIT·LEU group. Conclusion: Our findings suggest that the intake of CIT and LEU, with the practice of WBE and SSE, could improve body weight, muscle mass, bone mass, and PA in older women with low BMI, which may prevent sarcopenia and frailty.Trial registration: UMIN000022385. Registered 20 May 2016, https://upload.umin.ac.jp/cgi-open-39 bin/ctr/ctr.cgi?function=brows&action=brows&recptno=R000025797&type=summary&language=J

scholarly journals Sarcopenia Is Negatively Related to High Gravitational Impacts Achieved From Day-to-day Physical Activity

2017 ◽  
Vol 73 (5) ◽  
pp. 652-659 ◽  
Author(s):  
April Hartley ◽  
Celia L Gregson ◽  
Kimberly Hannam ◽  
Kevin C Deere ◽  
Emma M Clark ◽  
...  
Keyword(s):  
Physical Activity ◽  
Older Women ◽  
Lower Limb ◽  
Muscle Power ◽  
Negative Relationship ◽  
Community Dwelling ◽  
Muscle Size ◽  
Skeletal Health ◽  
Cross Sectional ◽  
Reduced Physical Activity

Abstract Background Sarcopenia has been associated with reduced physical activity (PA). We aimed to determine if sarcopenia, and specific components of muscle size, function, and physical performance, are associated with high impacts achieved during habitual PA, as these are related to bone strength in community-dwelling older women. Methods Participants were older women from the Cohort of Skeletal Health in Bristol and Avon. We defined sarcopenia using the EWGSOP criteria. Lower limb peak muscle power and force were assessed using Jumping Mechanography (JM). High vertical impacts were assessed by tri-axial accelerometry (at least 1.5g above gravity). Cross-sectional associations were analyzed by linear regression, adjusting for age, height and weight (or fat mass for models including appendicular lean mass index), comorbidities, smoking, alcohol, and Index of Multiple Deprivation. Results Our analyses included 380 participants, with mean age 76.7 (SD 3.0) years; 242 (64%) also completed JM. In age-adjusted analysis, a negative relationship was observed between severity of sarcopenia and high, but not medium or low, impacts (p = .03 for trend). Regarding components of sarcopenia underlying this relationship, multivariable analyses revealed that gait speed (β 1.47 [95% CI 1.14, 1.89], [β-1] reflects the proportionate increase in high impacts per SD increase in exposure) and peak force (1.40 [1.07, 1.84]) were independently associated with high impacts. Conclusions Older women with sarcopenia experienced fewer bone-strengthening high impacts than those with presarcopenia or without sarcopenia. To increase bone strengthening activity in older women, interventions need to improve both lower limb muscle force and walking speed.

Isokinetic Strength And Lower Limb Bone Mass Of Soccer Players And Non-athletes 11-15 Years

2010 ◽  
Vol 42 ◽  
pp. 218
Author(s):  
Antonio N. Rebelo ◽  
Sandro Mota ◽  
João Brito ◽  
Emanuel Passos ◽  
André Seabra ◽  
...  
Keyword(s):  
Bone Mass ◽  
Lower Limb ◽  
Soccer Players ◽  
Isokinetic Strength ◽  
Limb Bone
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