Running on age in a 15-km road run: minor influence of age on performance

The importance of exercise in the elderly is widely recognized, but data on performances and drop-out in short running contests are lacking. This hinders stimulation and coaching of elderly persons in active aging. The aim of the study was to determine age-related changes in running performance in the most popular Dutch road run, and how this is influenced by gender, training, and increased participation rate over the last decade. This is a retrospective analysis of 194,560 participants of a 15-km run from 1995 to 2007. Multiple regression analysis of running time by age, gender, and training was performed. Trends in participation were examined by chi-square tests and ANOVA. Trends in running time and speed were examined by t tests. With aging, running time increased with 0.20% per year (P < 0.001). Running time was on average 13% (P < 0.001) shorter in men than in women and was 15.7% (P < 0.001) shorter in participants who trained on a regular basis. Decline in performance with age was 5.9% larger for men than women (P < 0.01) and 4.5% larger for trained than untrained participants (P < 0.01). Over the last decade, participation numbers increased most for elderly (≥60 years) and female participants, mean running performance declined with 9.9% (P < 0.001). Drop-out number was low at all ages (0.13–0.29%). It appears that aging has only minor negative influences on running performance, which can even be attenuated by training. Our data suggest that exercise by means of running is a safe and rewarding option for improvement of healthy and active aging.     

Serum oxidizability potential is associated with age and exercise test results

The purpose of this paper is to find out whether serum oxidizability potential measured before an exercise test (EXT) correlates with age and ischemic heart disease severity. Oxidizability potential was determined in 3 age groups, in gr. I patients < 45 years, in gr. II age range = 45 - 70years {\hbox{range}} = {45} - {7}0{\hbox{years}} , and in gr. III patients > 70 years. Included subjects had chronic ischemic heart disease (IHD) and underwent a symptom-limited EXT upon initiation of a cardiac rehabilitation program. The thermo-chemiluminescence (TCL) assay was used to assess serum oxidizability potential. This assay is based on heat-induced oxidation of serum, leading to the formation of electronically excited species in the form of unstable carbonyls, which further decompose into stable carbonyls and light energy (low chemiluminescence). Measured photons emission is represented by a kinetic curve which is described by its amplitude and slope (=ratio). We assessed the correlations of TCL ratio with age, exercise duration, metabolic equivalents (METS), maximal heart rate (mHR), maximal systolic BP, >1 mm S-T depression, diabetes, hypertension, smoking, left ventricular ejection fraction (LVEF)> or <40%, previous myocardial infarction, and aorto-coronary bypass surgery. A high TCL ratio (%) correlated well with METS (r = 0.82), mHR (r = 0.77) and with exercise-induced S-T segment shift (r = 0.86, p < 0.05). A lower serum oxidizability potential, expressed as a low TCL ratio, thus suggestive of a previous high oxidative stress, was found in the two older age groups compared to gr. I (<45 years), p = 0.041, and in particular, in gr. III patients with low LVEF%. The TCL ratio (%) in gr. III was 188.7 ± 14.5, 192 ± 17 in gr. II, and 214 ± 13 in gr. I (p < 0.05), and was 166 ± 13.1 in gr. III with LVEF < 45% as compared to 271 ± 15.7 in gr. I patients with LVEF > 45% (p < 0.01). A trend for lower TCL ratio (%) was found in diabetic, hypertensive, and post-coronary bypass surgery patients. A paradoxically low TCL ratio (low oxidizability potential) was observed in patients without S-T depression compared to patients with S-T depression (189 ± 22 vs. 201 ± 15, p = NS), due to the fact these patients had a much lower LVEF% and a lower exercise capacity. Serum oxidizability potential is associated with age, EXT parameters, results, and IHD severity. TCL ratio is an “easy-to-measure marker” that might be incorporated into risk assessment and prediction in aged IHD patients.     

The impact of unsupervised regular walking on health: a sample of Turkish middle-aged and older adults

Regular walking is one of the most recommended and popular physical activity worldwide. This study (1) detected the effects of unsupervised regular walking on physical and cognitive functioning, emotional status, and quality of life in middle-aged and older adults and (2) compared the results with inactive controls. Forty middle-aged and older adults with a mean age of 56.30 ± 4.85 years (range 40–70) walking for at least 1 year, at least three times a week, and at least 45 min a day and 40 inactive participants with a mean age of 55.15 ± 5.64 years (range 40–70) participated. Before testing, sociodemographics of the participants were recorded. Body mass index and waist–hip ratio were calculated. The two groups were evaluated and compared in terms of physical functioning (handgrip strength, balance performance, cardio-vascular endurance, flexibility, muscular endurance and coordination), cognitive functioning (Mini Mental Test), emotional status (Beck Depression Inventory), and health related quality of life (CDC HRQOL- 4). The results obtained from this study showed that there were significant differences in terms of all outcome measurements between the groups (p < 0.05). The regular walking group had better scores in most parameters than the inactive controls. The results indicate that unsupervised regular walking improves health and is also a safe, cheap, and can easily be adapted into daily life. Therefore, it can be recommended to improve physical and cognitive functioning, emotional status, and quality of life of middle-aged and older adults.     

Is Speeding a Form of Gambling in Adolescents?

Speeding is a major contributor to motor vehicle accidents, which are the leading cause of death in adolescents. This study compares the extent to which adolescents with gambling behavior and substance use reported driving over the posted speed limits (“speeding”). Florida adolescents ages 13–17 (n = 1051) were surveyed, and asked about gambling activities, problems related to gambling, substance use, demographic questions, and speeding. Of the 562 respondents who were drivers, the gender distribution was 52.1% male and 47.9% female. Of those respondents, 76.9% were Caucasian, 6.8% were African American, 10.1% were Hispanic, and 6.1% were Native American/Asian/Other. Simple correlation analysis revealed that self-reported speeding is significantly related to gambling behavior and substance use. When a linear regression model was used, four factors showed the most significant influence on self-reported speeding: past year gambling tendency, age, trouble with the police due to drinking, and tranquilizer usage. Gambling behavior and high-risk speeding (driving ≥ 10 mph over speed limit) also were noted to be positively correlated. Our data indicate a relationship between risky driving, gambling, and other risk-taking behaviors in adolescents, and support the hypothesis that speeding may be a form of gambling behavior in this age group.     

Sport participation of the elderly��the role of gender, age, and social class

The article provides an overview of the results of cross-sectional and longitudinal data sets concerning sport participation of the elderly in Germany with a focus on correlations of sport participation with gender, age, and social class. A tabular overview lists the most central studies with their study design and publications from 2000 onwards. Findings regarding the motivations for sport participation of the elderly, the types of sport which are done, and the preferred settings are summarized. Eventually a conclusion is given about “what we know and what we don’t know.”     

Tracking of sport and exercise types from midlife to old age: a 20-year cohort study of British men

Background

Previous physical activity (PA) tracking studies have examined the stability of overall PA and/or PA types, but few have investigated how specific types of sport/exercise track over the life course. The aim of this study was to determine how specific sports/exercises in midlife track and predict future sport/exercise and PA in men transitioning to old age.

Methods

Seven thousand seven hundred thirty-five men (aged 40–59?years) recruited in 1978–80 were followed up after 12, 16 and 20?years. At each wave men self-reported participation in sport/exercise. Frequent sport/exercise participants (>?1/month) reported the types of sport/exercise they engaged in. Men also reported total PA, health status, lifestyle behaviours and socio-demographic characteristics. Stability of each sport/exercise was assessed using kappa statistics and intraclass correlation coefficients. Logistic regression estimated the odds of participating in sport/exercise and being active at 20-year follow up according to specific types of sport/exercise in midlife.

Results

Three thousand three hundred eighty-four men with complete data at all waves were included in analyses. Tracking of specific sports/exercises ranged from fair to substantial, with golf being the most common and most stable. Bowls was the most frequently adopted. Odds of participating in sport/exercise and being active in old age varied according to sport/exercise types in midlife. Golf and bowls in midlife were the strongest predictors of sport/exercise participation in old age. Golf, cricket and running/jogging in midlife were among the strongest predictors of being active in old age. Compared to participating in just one sport/exercise in midlife, sampling multiple sports/exercises was more strongly associated with sport/exercise participation and being active in old age.

Conclusion

The stability of sport/exercise participation from midlife to old age varies by type. Specific sports/exercises in midlife may be more likely to predict future PA than others. However, participating in a range of sports/exercises may be optimal for preserving PA into old age.

     

The differences of sarcopenia-related phenotypes: effects of gender and population

Sarcopenia is a serious condition especially in the elderly population mainly characterized by the loss of skeletal muscle mass and strength with aging. Extremity skeletal muscle mass index (EMMI) (sum of skeletal muscle mass in arms and legs/height²) is gaining popularity in sarcopenia definition (less than two standard deviations below the mean of a young adult reference group), but little is known about the gender- and population-specific differences of EMMI. This study aimed at investigating the differences of EMMI, arm muscle mass index (AMMI), and leg muscle mass index (LMMI) between gender groups and populations (Chinese vs. Caucasians). The participants included 1,809 Chinese and 362 Caucasians with normal weight aged from 19 to 45 years old. Extremity muscle mass, arm muscle mass, and leg muscle mass were measured by using dual energy x-ray absorptiometry. Independent sample t tests were used to analyze the differences in muscle mass indexes between the studied groups. All the study parameters including EMMIs, AMMIs, and LMMIs were significantly higher (P ≤ 0.0003) in the Caucasian group than in the Chinese group and also higher in the male group than in the female group, and these significant differences (P ≤ 0.0005) remained after adjusting for age by simple regressions. The detected differences of muscle mass indexes between different gender and ethnic groups may provide important implications in their different risk of future sarcopenia.     

Acyclic sets of linear orders

 A set of linear orders on {1,2, ℕ, n} is acyclic if no three of its orders have an embedded permutation 3-cycle {abc, cab, bca}. Let f (n) be the maximum cardinality of an acyclic set of linear orders on {1,2, ℕ, n}. The problem of determining f (n) has interested social choice theorists for many years because it is the greatest number of linear orders on a set of n alternatives that guarantees transitivity of majority preferences when every voter in an arbitrary finite set has any one of those orders as his or her preference order. This paper gives improved lower and upper bounds for f (n). We note that f (5)=20 and that all maximum acyclic sets at n=4, 5 are generated by an “alternating scheme.” This procedure becomes suboptimal at least by n=16, where a “replacement scheme” overtakes it. The presently-best large-n lower bound is approximately f (n)≥(2.1708) ⁿ . Received: 5 April 1995/Accepted: 10 November 1995     

Use of urban marine habitats by foraging wading birds

Wading birds (i.e, Ardeidae: herons, egrets, and bitterns) are a guild of waterbirds that forage in coastal habitats which in the US and Europe are often located in close proximity to urban centers. However, the use of urban marine habitats may have consequences for bird populations, as birds can be subject to stress from increased levels of passive and active human disturbance. We examined the effects of human disturbance, available foraging habitat, and prey abundance on wading bird density and species richness at 17 urban coastal sites in Narragansett Bay, Rhode Island USA. The sites represented a gradient of immediately adjacent residential and commercial land use (e.g., 0.0–67.7% urban land use within a 30.5 m buffer of the sites) within an urban matrix (i.e., all sites were located within a suburban center with a population of about 85,000 people). Wading bird density (0.62 ± 0.12 birds ha⁻¹) and species richness (average 4.49 ± 0.37 species across all sites) were not influenced by passive human disturbance as measured by the extent of urban land surrounding a site. However, wading bird density and species richness both decreased significantly as active disturbance (i.e., number of boats moored or docked upstream of the site) increased (r = −0.56, F = 6.85, p = 0.019 and r = −0.73, F = 16.6, p = 0.001, respectively). In addition, both density (r = 0.72, F = 16.2, p = 0.001) and species richness (r = 0.72, F = 16.2, p = 0.001) increased concomitantly with a prey index that combines the density of fish and invertebrates on which the birds feed with the amount of available shallow water foraging habitat at a site. Our results suggest that wading birds i) may not be negatively affected by urban land surrounding estuarine foraging areas in and of itself; and ii) may be utilizing urban areas in the absence of high levels of active disturbance to take advantage of potentially enhanced prey resources. In the case where the benefits of foraging at a site outweigh the costs related to human disturbance, urban marine habitats may need to be considered for restoration or protection from further increases in active human disturbance.     

Frequency of Group Sex Participation and Risk for HIV/STI Among Young Adult Nightclub Scene Participants

Objectives: This study examines frequency of group sex participation and associated characteristics and behaviors among a sample of heterosexual young adult participants in Miami's nightclub scene (n = 498). Methods: Baseline survey assessments were analyzed using zero-inflated binomial regression. Results: Forty-one percent of the sample reported group sex participation history. Greater frequency of group sex is associated with buying sex, sex with an injection drug user, being high during sex, condomless vaginal sex, victimization history, and sexually transmitted infection incidence (p < .02). Conclusions: Sexually transmitted infection prevention and intervention efforts should address risks associated with group sex participation.     

Female Athletes' Motives and Experiences During the Gay Games

This study examines female athletes' motives for participation in Gay Games IV, and their experiences during the Games. The participants (N = 132) acknowledged traditional sport motives as well as social, self-enhancement, and political motives for participation in the Gay Games. Positive aspects of these athletes' experiences at the Games included having a sense of belonging, pride, and community. Meeting, competing with, and being near other lesbian, gay, and bisexual athletes also were important motives and outcomes of participation in this event. Almost all of the athletes described positive experiences at the Games. The experiences expressed by these athletes show the affirming emotional and psychological impact of participation in an inclusive sport environment. Overall, while many of these athletes noted sport highlights in describing their experiences, the social and personal development were voiced more consistently and frequently.     

Intellectual Integration and Articles in Core Sociology Journals, 1960–2000

This study builds on and extends two studies by Oromaner (J Am Soc Inf Sci, 28:34–37, 1977; Int J Inf Manage, 6:29–35, 1986) in which he examined the integrating role of sociology’s three core general journals (American Journal of Sociology (AJS), American Sociological Review (ASR), Social Forces (SF)) among both core (N = 3) and specialty (N = 7) journals. In each study he traced the number of citations received by full-length articles published in the core journals (1960, 1973) during the first 10 years after publication. The present study replicates this methodology for articles published in 1990. In addition, the present study looks at the relationship between each of the core journals and each of the ten citing journals. The percent of core articles cited has increased from 67 to 84, however, the percent cited in five or more journals has remained quite stable and low (13%, 10%, 12%). Core journal articles are more likely to be cited in core journals than they are in specialty journals, and there appears to be some relationship between specific core journals and certain specialty journals. More in depth analysis is presented for the 1990 cohort.     

Sex life after 65: How does erectile dysfunction affect ageing and elderly men?

Introduction. We report the findings pertinent to the ageing and elderly participants of a population-based study of erectile dysfunction (ED).

Method. We examined the sociodemographic characteristics, self-reported morbidities and responses to the 5-item International Index of Erectile Function (IIEF-5) of participants aged ≥65 years and ≥80 years.

Results. Most (73%) participants were married or had partners. Among the participants aged ≥65 years, the prevalence of ED (IIEF-5 scores <22) was 67% and of severe ED (IIEF-5 scores <8) 48%. About 32% were sexually active, and 11% had regular sexual intercourse. Cardiovascular disease (CVD) was reported in 37% and diabetes mellitus (DM) in 13%, with odds of ED at 3.91 and 4.68, respectively. Among those aged ≥80 years, the prevalence of ED was 68% and of severe ED 57%. About 12% were sexually active, and 3% had regular sexual intercourse. CVD was reported in 44% and DM in 11%, with corresponding odds of ED at 2.55 and 2.90.

Conclusions. Most ageing and elderly men are in a relationship and many are sexually active. ED is prevalent and severe. Morbidities are common and significantly associated with ED, impairing the sex lives of affected men.     

Bone mineral density in men with and without the metabolic syndrome

The objective of this study was to measure bone mineral density (BMD) in middle-aged men with and without the metabolic syndrome according to the International diabetes federation (IDF) definition from 2005. We studied 80 men (mean age: 51.9 ± 9.0 y, mean body mass index (BMI): 32.0 ± 1.7 kg/m²) with and 92 men without the metabolic syndrome (mean age: 52.6 ± 15.1 y, mean BMI: 24.9 ± 2.8 kg/m²). Height (cm), weight (kg), waist circumference (cm) and blood pressure were measured. Fasting plasma glucose (FPG) and blood lipids were determined. BMD at the lumbar spine and total hip was measured by dual X-ray absorptiometry on a Hologic QDR 4500 bone densitometer. In men around 59.3% had a waist circumference > 94 cm (abdominal obesity). Among them 58.7% showed abnormal BP values. Around 30.7% had FPG ≥ 5.6 mmol/L and 22.7% had low high density lipoprotein (HDL)-cholesterol and 36.6% had hypertriglyceridemia. In men with the metabolic syndrome, mean lumbar spine BMD was 0.986 ± 0.210 g/cm² and total hip BMD – 1.012 ± 0.209 g/cm². The corresponding values in men without this syndrome were 0.934 ± 0.179 g/cm² and 0.894 ± 0.189 g/cm², respectively. The inter-group BMD difference reached statistical significance only at the hip (p = 0.039). Respectively, the prevalence of osteoporosis at the central sites was significantly higher in men without the metabolic syndrome (MS) (13.2 versus 20.8%, p = 0.03). Our data confirmed the trend for higher BMD in the studied men with the metabolic syndrome.     

Low total testosterone is associated with increased risk of incident type 2 diabetes mellitus in men: results from the Study of Health in Pomerania (SHIP)

Objective.?There is increasing evidence suggesting that low total testosterone concentration is associated with incident type 2 diabetes mellitus (T2DM) in men. The aim of this study was to evaluate the association between total testosterone and incident T2DM in a large population-based cohort.

Methods.?Of 2117 men at baseline, 1589 were followed up 5 years later. Low total testosterone concentration at baseline determined by <10th percentile (10-year age-strata) were used as a risk factor for incident T2DM at follow-up. To evaluate for potential non-response bias, drop out weights were used in sensitivity analysis.

Results.?From 1339 men eligible for analyses, 68 (5.1%) developed T2DM. Men with low total testosterone concentration had an increased risk of developing T2DM (odds ratio [OR] 3.4, 95% CI 1.9–6.1), even after adjustment for age, waist circumference and smoking, OR 3.0; (95% CI 1.6–5.7). Recalculated weighted models revealed almost identical estimates indicating no relevant non-response bias.

Discussion.?Our prospective findings suggest that low total testosterone concentration is associated with incident T2DM in men and might represent a biomarker that might causally be involved in the risk of T2DM. This underlines the importance of measuring total testosterone in men as the predominant male sex hormone.     

Why older Australians participate in exercise and sport

Research on variables that encourage older adults to exercise is limited. This study was carried out to identify the participation motives of older Australians involved in regular exercise and sport. The 815 participants (399 men, 416 women) ranged in age from 55 to 93 years (M = 63.6, SD = 7.8) and were participating in their activities of choice at least once per week. All participants completed the Participation Motivation Questionnaire for Older Adults. The most common exercise/sport activities that participants were involved in were walking, golf, lawn bowls, tennis, and swimming. The most highly reported motives for participation were to keep healthy, liking the activity, to improve fitness, and to maintain joint mobility. Principal-components analysis of the questionnaire revealed 6 factors: social, fitness, recognition, challenge/benefits, medical, and involvement. Analyses of variance showed significant differences in reasons for participation in exercise and sport based on gender, age, education level, and occupation.     

Interactive effects of work psychosocial factors on participation in workplace wellness programs

This study explored concurrent effects of six work psychosocial factors on current participation and the self-reported likelihood of future participation in workplace wellness programs using a cross-sectional survey, an ad hoc focus group, and structured interviews. Classification and regression tree analysis was used to analyze survey responses from 343 employees (194 nonparticipants, 95 participants, and 54 engaged participants). A thematic analysis of focus group (n?=?7) and interview (n?=?5) narratives was also undertaken. In combination with high work control, high superior support was associated with an engaged participant profile. Job demand was the third important variable with low and very high levels associated with participation. With regard to high likelihood of future participation, among respondents with age older than 50, high predictability of occupational activities and control were identified as a significant factor, and among others, high superior support and control. The analysis of narratives revealed peer relations and flexible working hours to be positively linked to participation and general job stress was identified as having a bidirectional relationship. Employees stated that stress led them to take advantage of these programs as a source of relief and that their availability/participation has contributed to lowering their stress. These findings inform practitioners about the importance of addressing poor psychosocial factors as a participation barrier and having a holistic approach to employee well-being.     

Toward increasing avian diversity: urban wildscapes programs

Residential development in urban and suburban settings is a major cause of habitat change affecting avian communities. The effects from land-clearing prior to initiation of construction followed by landscaping focused on traditional aesthetics has reduced habitat diversity at multiple levels. These residential developments generally emphasize the use of ornamental, nonindigenous vegetation with little to no concern for native species and natural vegetation parameters. As a result, avian community composition and diversity is changed. We compared avian communities at three sites in Bexar County, Texas; two residential neighborhoods in the city of San Antonio and an unincorporated undeveloped site, Government Canyon State Natural Area. The residential neighborhoods were a Texas Parks and Wildlife Department certified wildscapes development and a traditionally developed neighborhood. Bird abundance and species richness in the neighborhoods were greater than at Government Canyon State Natural Area (P < 0.01), but no differences existed between the neighborhoods. Bird diversity was greatest at the wildscapes neighborhood (P < 0.01). Further, bird diversity did not differ between the traditional neighborhood and the natural area. Evenness differed among sites (P = 0.006) with the natural area having the greatest value. Bird diversity measures correlated with woody plant density and vertical cover (r = 0.358 to 0.673, P < 0.05) at residential sites. Residential areas incorporating natural landscapes into their design attracted a greater variety of birds than traditionally landscaped residential areas.     

Estimation of energy expenditure using accelerometers and activity-based energy models��validation of a new device

Over the last few years, the estimation of energy expenditure with accelerometers has become more and more accurate due to improvements in sensor technology. Significant enhancement could be reached by model-based estimation regarding different activity types. The kmsMove-sensor (movisens GmbH, Karlsruhe, Germany) is a device that is used to compute human energy expenditure using motion-dependent calculation models. It is outfitted with an accelerometer to measure body acceleration during certain movements and activities. To validate its accuracy, the sensor was compared to indirect calorimetry as criterion measure. For this experiment, nine subjects (all males, age 46.4 ± 10.9 years, 28–64 years) were equipped with the kmsMove-sensor as well as a portable indirect calorimeter and their energy consumption was measured over a time period of 100 min. Additionally, the energy consumption of seven out of the above-mentioned nine subjects was measured over an average of 7 h. The measurements took place in a rehabilitation clinic, where the subjects completed their regular daily rehabilitation activities. An analysis of the data revealed ICCs between the kmsMove-sensor and indirect calorimetry for the time period of 100 min of 0.82 (0.38–0.96; p = 0.003) and for an averaged measuring time of 7 h of 0.81 (0.22–0.97; p = 0.01). Furthermore, a Bland–Altman analysis for the time period of 100 min led to a difference of the means of 4.3 kcal (limits of agreement: −94.3 and 102.9 kcal) and for the time period of an average of 7 h to −14.0 kcal (limits of agreement: −320.0 and 292.0 kcal). These findings indicate that the kmsMove-sensor is an appropriate measuring device with relatively good accuracy to assess human energy expenditure in rehabilitation patients. However, this study has some limiting aspects (small sample size, artificial setting) which could influence validity.     

Comparing measures of general and abdominal adiposity as predictors of blood pressure in college students

Objective: To compare anthropometric measures of body mass index (BMI), waist circumference (WC), waist-to-height ratio (WHtR), and sagittal abdominal diameter (SAD) as predictors of blood pressure in college students. Participants: Students (N = 116) were recruited from November 2012 to May 2014 at an urban university and rural community colleges. Methods: Students underwent a brief physical examination during which anthropometric measures were obtained and blood pressure was measured. Covariates were measured using self-reported questionnaires. Hierarchical multiple linear regressions were used for the data analysis. Results: All anthropometric measures were predictive of systolic (SBP) and diastolic blood pressure (DBP). WC was the strongest predictor of SBP (β = .582, p < .01) explaining an additional 3–4% of the variance than BMI, WHtR, or SAD. The measures were similar in predicting DBP. WC predicted SBP independent of BMI. Conclusions: Clinicians should consider using WC to assess the risk for hypertension in college students.