The effect of aging on skeletal-muscle recovery from exercise: possible implications for aging athletes

Recovery from exercise is integral to the physical training process. There is a perception among older athletes that aging negatively affects the recovery process. Plausible arguments for an impaired recovery with aging are a greater susceptibility of older muscle to exercise-induced skeletal-muscle damage and a slower repair and adaptation response. Differences in the physical activity level of the research participants are rarely considered, however. This makes it difficult to differentiate the respective roles of declining physical activity and aging on the recovery process. Furthermore, the type of exercise used to induce damage and monitor recovery is often not indicative of a normal training stimulus for athletes. This review discusses the effects of aging on skeletal-muscle damage and recovery processes and highlights the limitations of many of these studies with respect to older athletes. Future research should use an exercise intervention representative of a normal training stimulus and take the physical activity level of the participants into account.     

The effect of aging on pacing strategies of cross-country skiers and the role of performance level

Background

The participation of master cross-country (XC) skiers in training and competition has increased during the last decades; however, little is known yet about whether these athletes differ from their younger counterparts in aspects of performance such as pacing. Therefore, the aim of the present study was to examine the combined effect of age and performance (race time) on pacing in cross-country (XC) skiing. We analyzed all finishers (n?=?79,722) in ‘Vasaloppet’ from 2012 to 2017, the largest cross-country skiing race in the world, classified according to their race time into 10 groups: 3-4 h, 4-5 h, ..., 12-13 h.

Results

A trivial main effect of sex on total pace range was observed (p?<?0.001, η²?=?0.002), where women (44.1?±?10.2%) had larger total pace range than men (40.9?±?11.8%). A large main effect of performance group on total pace range was shown (p?<?0.001, η²?=?0.160), where the smallest total pace range was 21.8?±?1.9% (3-4 h group) and the largest 50.1?±?9.9% (10-11 h group). A trivial sex×performance group interaction on total pace range was found (p?<?0.001, η²?=?0.001) with the largest sex difference in pacing shown in 9-10 h group. A trivial and small main effect of age was found in women (p?<?0.001, η²?=?0.005) and men (p?<?0.001, η²?=?0.011), respectively, where the masters had smaller total pace range than their younger counterparts. A trivial age group×performance group interaction on total pace range was observed in both women (p?<?0.001, η²?=?0.008) and men (p?<?0.001, η²?=?0.006) with smaller differences among age groups in the faster performance groups.

Conclusions

In summary, master XC skiers adopted a relatively even pacing independently from their race time and the differences in pacing from the younger XC skiers were more pronounced in the slower masters. These findings suggest that exercise attenuates the decline of performance in master XC skiers as shown by the similar pacing strategies between fast master XC skiers and their younger counterparts.

     

Bingo playing in the UK: The influence of demographic factors on play

Abstract

Despite the popularity of bingo, it is a little studied gambling behaviour. This study was conducted in order to obtain general information regarding the gambling behaviour of current UK bingo players. A total of 412 bingo players completed questionnaires about their gambling behaviour. The majority of participants (57%) played once or twice a week with a small percentage (3%) playing five or more times a week. A large percentage of participants also played the National Lottery (82%) and bought National Lottery scratchcards (40%), but very few ever gambled in a casino (6%). An analysis by age revealed that older bingo players were significantly more likely to play more often. However, younger players are more likely to spend more per bingo session. This paper adds significantly to a sparse literature. The data collected add to our understanding of the bingo phenomenon in the UK.     

The relationship between gambling and video-game playing behavior in children and adolescents

It is suggested that commercial video-games (e.g.Nintendo &Sega) and gambling activities have similar attractive features and intermittent reinforcement schedules. This research seeks to examine the nature of this relationship amongst children. One hundred and four children aged 9 to 14, from grades 4, 6, and 8, participated. A questionnaire exploring issues related to video-game playing and gambling behavior in children and adolescents was completed and a computerized blackjack game was individually administered. High frequency video-game players were compared to low frequency video-game players with respect to their gambling performance on the blackjack gambling task as well as on information gathered from the questionnaire. Of particular concern is the risk-taking strategies used by avid video-game players, whether or not children perceive gambling and video-games as involving similar amounts of skill or whether they realize that gambling is primarily a game of chance. The findings, in general, suggest that high frequency video-game players gamble more than low frequency video-game players, report that gambling makes them feel more important, and take greater risks on the blackjack gambling task although no overall differences in success were found. Males exhibited greater risk-taking tendencies on the blackjack task than females. The clinical implications of the findings are addressed.This research was partially supported by a grant from the McGill University Social Science Computer Committee.This is a revision of a paper presented at the Ninth International Conference on Gambling and Risk Taking, Las Vegas, 1994.The authors would like to thank the administration, staff, and students in T.H. Bowes, Prince Charles, Souvenir, Gerald McShane, Our Lady of Pompei, Pierrefonds Comprehensive High School, and Western Laval High School, for their participation and cooperation in this study.     

The biology of aging

Reproduced with permission     

The transparency of aging

This article is not meant to provide answers but to provoke thinking related to the questions we should be asking about the ethical personhood of aging adults. Are we covering over the rich opportunities to learn from their stories with an invisible cloak of transparency? Health care professionals have a moral obligation to rethink the assumptions that underlie their definitions of quality of life in aging. We cannot know what should be done unless we learn to listen to the life stories of aging people. This may even help us to see what is most real.     

The flavor of aging

The ability to smell and taste breaks down with age, diminishing quality of life and impeding good nutrition. Researchers are beginning to understand why these senses falter. Improved techniques and experimental methods promise to lend new insights, perhaps revealing ways to make aging easier to swallow.     

The burden of pain on the shoulders of aging

More than 9% of the world population is older than 60. With age comes additional vulnerability to pain and the accumulation of insults that can engender ongoing misery. Insights into molecular and cellular aspects of pain might help escort people more comfortably into the senior ranks, but research that specifically addresses pain in the elderly is only now gearing up. Although a comprehensive understanding of how aging affects pain--and vice versa--is far off, experts report a good outlook for helping the millions of undertreated older people who experience pain on a daily basis.     

我国城市空间多元利益主体博弈的思考

随着城市的不断发展,城市规划在我国越来越受到重视,这也是政府管理和经营城市的一种体现。然而,城市规划者也有自身的利益和价值观,规划结果一般反映的是多元利益主体博弈后获胜方的决策和意志,而这种带有“利益偏见”的规划可能导致城市空间的畸形发展或影响城市的可持续发展。因此,城市规划天平在控制和协调上的失衡会加剧城市发展中各种矛盾的显现。为此,     

The accuracy and biases of diary communication data

A study to determine the accuracy and reliability of telephone communications data obtained via self-recording diaries was undertaken. The methodology involved comparing data obtained from the diaries to the more objective data provided by the recording capabilities of a PBX (Private branch Exchange). Two questions formed the basis for the analysis. First, what is the level of accuracy of diary data, and, second what biases are inherent in data obtained from self-recorded diaries. The findings indicate that diary data significantly understate the actual frequency of communications. There were also several biases inherent in the diary data. One involved a significant understatement of very short communications (i.e. those lasting less than 90 seconds). The others showed an under-recording of received calls and a likelihood to record internal rather than external cals. The conclusion drawn is that in the absence of objective data (i.e. data obtained from machine recording) diaries can provide usable data as long as one pays attention to the biases inherent in their use.     

The aging male in Malaysia

Interest in clinical investigations about the health-related quality of life (HRQoL) of aging men has increased in recent years. The aim of this paper is to inform the scientific community about a harmonized French Aging Males' Symptoms (AMS) Scale. There were two slightly different French AMS Scales, which both underwent an up-to-date linguistic and cultural translation process, i.e. were valid to be applied in research. However, it was felt to be unfortunate that two versions of one language in one country existed. Therefore, an ad hoc committee of both translation teams were asked to develop a harmonized single French AMS Scale. The harmonization meeting developed a consensus item-by-item and the new French reference scale was agreed upon. It was agreed that only this scale should be published to avoid confusion among future users. The French AMS Scale published in this paper should be used for future research and necessary cultural/linguistic adaptations in the French-speaking world.     

The interaction of aging and 10 years of racing on ultraendurance running performance

The aim of this study was to examine the interaction between aging and 10 years of racing in endurance runners. Race-time data from 194 runners who had completed 10 consecutive 56-km ultramarathons were obtained. The runners were either 20.5 +/- 0.7, 30.0 +/- 1.0, 39.9 +/- 0.9, or 49.4 +/- 1.0 years old at their first race. Each runner's race speed was determined for each race over the 10 years. Data were analyzed using repeated-measures ANOVA, one-way ANOVA, and independent t tests and showed that performance improved and declined at greater rates for younger runners; younger runners had a greater capacity for improvement than older runners; approximately 4 years were required to reach peak racing speed, regardless of age; it was not possible to compete at peak speed for more than a few years; and the combined effects of 10 years of aging and racing neither improve nor worsen net performance. In conclusion, these data suggest that although these runners showed similar patterns of change in race speed over a 10-year period, the extent of change in performance was greater in younger than in older runners.     

Bringing together housing and aging services: the experiences of area agencies on aging

Aging organizations generally do not consider housing issues as an important priority. Research suggests that lack of knowledge may be a significant barrier that prevents their involvement in housing-related activities. This article reports on a study that examined the extent and level of AAAs' involvement in housing-related activities with particular attention to instances of cooperation and collaboration between AAAs and housing agencies. It employed a national survey of Area Agencies on Aging (AAAs). Further, since the lack of knowledge about housing is a barrier to involvement, the study examined the role of a housing specialist in motivating higher levels of activity. Though there is no single overall indicator of activities to do with housing, the results indicate a range of activities pursued by AAAs. The presence of a housing specialist within the AAA generally served as a catalyst, motivating higher levels of this kind of activity. The importance of housing as a component of a comprehensive long-term care continuum is also discussed.     

The complementary self: Multiple perspectives on the aging person

The notion of self in older age has been extensively explored from a variety of disciplines. Using personal narratives, researchers have attempted to identify key features of the articulated self in later life. However, often missing from discussions of the self is a deeper exploration of old age as it is culturally constructed, narrated and interpreted in Western society. Narrative form and overriding cultural ideals often shape what is presented, leaving one to ask whether narratives on aging are more about the cultural identities of the elderly rather than the aging self. This article readdresses the idea of a complex interplay between an active though often unarticulated “complementary” self in tandem with the externally presented self.     

Choking under pressure and gender: Evidence from professional tennis

We exploit a unique setting in which two professionals compete in a real-life tennis contest with high monetary rewards in order to assess how men and women respond to competitive pressure. Comparing their performance in low-stakes versus high-stakes situations, we find that men consistently choke under competitive pressure, but with regard to women the results are mixed. Furthermore, even if women show a drop in performance in the more crucial stages of the match, it is in any event about 50% smaller than that of men. These findings are robust to different specifications and estimation strategies.     

The quest for a general theory of aging and longevity

Extensive studies of phenomena related to aging have produced many diverse findings, which require a general theoretical framework to be organized into a comprehensive body of knowledge. As demonstrated by the success of evolutionary theories of aging, quite general theoretical considerations can be very useful when applied to research on aging. In this theoretical study, we attempt to gain insight into aging by applying a general theory of systems failure known as reliability theory. Considerations of this theory lead to the following conclusions: (i) Redundancy is a concept of crucial importance for understanding aging, particularly the systemic nature of aging. Systems that are redundant in numbers of irreplaceable elements deteriorate (that is, age) over time, even if they are built of elements that do not themselves age. (ii) An apparent aging rate or expression of aging is higher for systems that have higher levels of redundancy. (iii) Redundancy exhaustion over the life course explains a number of observations about mortality, including mortality convergence at later life (when death rates are becoming relatively similar at advanced ages for different populations of the same species) as well as late-life mortality deceleration, leveling off, and mortality plateaus. (iv) Living organisms apparently contain a high load of initial damage from the early stages of development, and therefore their life span and aging patterns may be sensitive to early-life conditions that determine this initial damage load. Thus, the reliability theory provides a parsimonious explanation for many important aging-related phenomena and suggests a number of interesting testable predictions. We therefore suggest adding the reliability theory to the arsenal of methodological approaches applied to research on aging.