Hormonal Responses to Resistance Exercise in Long-Term Trained and Untrained Middle-Aged Men

2008 ◽  
Vol 22 (5) ◽  
pp. 1617-1624 ◽  
Author(s):  
Eduardo Lusa Cadore ◽  
Francisco Luiz Rodrigues Lhullier ◽  
Michel Arias Brentano ◽  
Eduardo Marczwski da Silva ◽  
Melissa Bueno Ambrosini ◽  
...  
2019 ◽  
Vol 3 (sup1) ◽  
pp. 53-53
Author(s):  
Jamie Romeo ◽  
Grigorios Papageorgiou ◽  
Francisco da Costa ◽  
Hans Sievers ◽  
Ad Bogers ◽  
...  

2020 ◽  
Vol 9 (2) ◽  
pp. 522
Author(s):  
Ulrike H. Mitchell ◽  
Bruce Bailey ◽  
Patrick J. Owen

Aerobic exercise training has many known cardiovascular benefits that may promote healthy aging. It is not known if long-term aerobic exercise training is also associated with structural benefits (e.g., lower fat mass, higher areal bone mineral density (BMD) and greater muscle mass). We evaluated these parameters in middle-aged long-term endurance runners compared to sex-, age-, height-, and weight-matched non-running controls. Total and regional lean and fat mass and areal BMD were assessed by dual-energy X-ray absorptiometry. Sagittal magnetic resonance images captured the cross-sectional area and thickness of the lumbar multifidus. Runners (n = 10; all male) had a mean (standard deviation; SD) age of 49 (4) years, height of 178.9 (4.9) cm, weight of 67.8 (5.8) kg, body mass index (BMI) of 21.4 (1.4) kg/m2 and had been running 82.6 (27.9) km/week for 23 (13) years. Controls (n = 9) had a mean (SD) age of 51 (5) years, height of 176.0 (5.1) cm, weight of 72.8 (7.1) kg, and BMI of 23.7 (2.1) kg/m2. BMI was greater in controls (p = 0.010). When compared to controls on average, runners had a 10 percentage-point greater total body lean mass than controls (p = 0.001) and 14% greater trunk lean mass (p = 0.010), as well as less total body (8.6 kg; p < 0.001), arm (58%; p = 0.002), leg (52%; p < 0.001), trunk (73%; p < 0.001), android (91%; p < 0.001), and gynoid fat mass (64%; p < 0.001). No differences were observed between groups for BMD outcomes or multifidus size. These results underscore the benefits of endurance running to body composition that carry over to middle-age.


2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 25-25
Author(s):  
Xiao Xu ◽  
Jersey Liang ◽  
BoRin Kim ◽  
James Raymo ◽  
Mary Beth Ofstedal

Abstract Existing literature on childlessness among middle-aged and older Americans is sparse, and measuring childlessness is not straightforward for those with complex family histories. To address this knowledge gap, we examined data on 19,929 respondents age ≥50 from the 2016 Health and Retirement Study. All analyses accounted for complex sample design to generate nationally representative estimates. The proportion of respondents without children differed significantly depending on how “childless” was defined: 1) 14.9% (95% confidence interval [CI]: 13.9-15.9%) having no biological children, versus 2) 10.4% (95% CI: 9.5-11.3%) having no children/step-children that were living and in-contact. When measured based on absence of biological children, the prevalence of childlessness was higher in younger cohorts (17.7%, 13.2%, and 9.0% for age 50-64, 65-74, and ≥75 years, respectively, p&lt;0.001) and among more educated individuals (17.4%, 12.3%, and 9.6% for more than high school, high school, and less than high school education, respectively, p&lt;0.001). The prevalence of childlessness was also higher among men (16.7%) than women (13.2%) (p&lt;0.001) and among non-Hispanic whites (16.0%) than Hispanics (9.8%) (p&lt;0.001). Similar patterns, but lower prevalence, were observed when measuring childlessness based on absence of children/step-children that were living and in-contact. Although non-Hispanic whites (16.0%) were more likely than non-Hispanic blacks (13.0%) to have no biological children (p=0.007), a similar proportion of them had no children/step-children that were living and in-contact (10.8% versus 10.6%, p=0.06). Given fertility decline and growing family complexity, these findings help inform the structure of social support and long-term care needs of middle-aged and older Americans.


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