Influence of age and gender on cardiac output-V˙o 2 relationships during submaximal cycle ergometry

1998 ◽  
Vol 84 (2) ◽  
pp. 599-605 ◽  
Author(s):  
David N. Proctor ◽  
Kenneth C. Beck ◽  
Peter H. Shen ◽  
Tamara J. Eickhoff ◽  
John R. Halliwill ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Stroke Volume ◽  
Age Groups ◽  
Older Men ◽  
Cycle Ergometry ◽  
Age And Gender ◽  
Younger Women ◽  
Leg Cycle Ergometry ◽  
Younger Men ◽  
And Gender

Proctor, David N., Kenneth C. Beck, Peter H. Shen, Tamara J. Eickhoff, John R. Halliwill, and Michael J. Joyner. Influence of age and gender on cardiac output-V˙o 2 relationships during submaximal cycle ergometry. J. Appl. Physiol. 84(2): 599–605, 1998.—It is presently unclear how gender, aging, and physical activity status interact to determine the magnitude of the rise in cardiac output (Q˙c) during dynamic exercise. To clarify this issue, the present study examined theQ˙c-O2 uptake (V˙o 2) relationship during graded leg cycle ergometry in 30 chronically endurance-trained subjects from four groups ( n = 6–8/group): younger men (20–30 yr), older men (56–72 yr), younger women (24–31 yr), and older women (51–72 yr). Q˙c (acetylene rebreathing), stroke volume (Q˙c/heart rate), and whole bodyV˙o 2 were measured at rest and during submaximal exercise intensities (40, 70, and ∼90% of peakV˙o 2). Baseline resting levels of Q˙c were 0.6–1.2 l/min less in the older groups. However, the slopes of theQ˙c-V˙o 2relationship across submaximal levels of cycling were similar among all four groups (5.4–5.9 l/l). The absolute Q˙c associated with a given V˙o 2(1.0–2.0 l/min) was also similar among groups. Resting and exercise stroke volumes (ml/beat) were lower in women than in men but did not differ among age groups. However, older men and women showed a reduced ability, relative to their younger counterparts, to maintain stroke volume at exercise intensities above 70% of peakV˙o 2. This latter effect was most prominent in the oldest women. These findings suggest that neither age nor gender has a significant impact on theQ˙c-V˙o 2relationships during submaximal cycle ergometry among chronically endurance-trained individuals.

scholarly journals The Who and When of Worry: The Fading Impact of Gender on Worry and Anxiety Severity Among Older Adults

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 372-372
Author(s):  
Katie Granier ◽  
Rebecca Ingram ◽  
Daniel Segal
Keyword(s):  
Older Adults ◽  
Interaction Effect ◽  
Significant Interaction ◽  
Age Groups ◽  
Significant Interaction Effect ◽  
Age And Gender ◽  
Younger Women ◽  
Younger Age ◽  
Younger Men ◽  
And Gender

Abstract Introduction. This study examined the influence of age and gender on diverse worry constructs and overall anxiety among younger (age 18-30) and older (age 65+) adults. Methods. 411 participants (311 younger, 100 older adults; 77.1% female) completed the PSWQ, BMWS, WDQ, and GAS online. Results. Among a series of 2x2 between-subjects ANOVAs, significant interaction effects between age and gender were found among all worry and anxiety measures. Specifically, there was a significant interaction effect on worry severity as measured by the PSWQ (F[1, 393]=4.28, p<.05), the WDQ (F[1, 397]=8.42, p<.01) and the BMWS (F[1, 396]=10.41, p<.01). Gender had a larger impact on worry among younger adults than older, though both age groups showed similar patterns of women reporting greater worry than men. Though both younger and older adults showed a gender difference in worry severity, this difference was mitigated by late life. There was also an interaction effect on anxiety (GAS total) in that younger women reported greater anxiety than younger men but older adults reported similar anxiety across genders, F(1, 384)=9.78, p<.01. Simple main effects analysis showed that younger women scored higher than older women on all measures of worry and anxiety, whereas younger men scored higher than older men on the PSWQ and WDQ but not the BMWS or GAS. Discussion. Consistent with previous literature, women reported greater worry and anxiety than men. However, this difference was mitigated and even extinguished among some measures in older adults. Possible explanations are discussed.

Age and gender interactions on verbal memory performance

2003 ◽  
Vol 9 (1) ◽  
pp. 97-102 ◽  
Author(s):  
JOEL H. KRAMER ◽  
KRISTINE YAFFE ◽  
JEANNE LENGENFELDER ◽  
DEAN C. DELIS
Keyword(s):  
Older Women ◽  
Verbal Memory ◽  
Memory Performance ◽  
Older Men ◽  
Age And Gender ◽  
Younger Women ◽  
Age Related ◽  
Younger Men ◽  
And Gender ◽  
Gender Interactions

Age and gender effects on verbal episodic memory are well established. However, the possibility of interactions between age and gender has been raised by studies linking estrogen and verbal memory performance, and by research suggesting gender differences in age-related cortical atrophy. We evaluated whether age by gender interactions in verbal memory were present. Subjects within three years of the median age of menopause were excluded from a large cohort of normal subjects, resulting in a younger sample (16–47 years) of 288 men and 285 women, and an older sample (55–89 years) of 201 men and 245 women. All subjects were administered the CVLT-2, a multiple-trial list-learning task. Verbal memory was negatively correlated with age for younger men, older men, and older women, but not for younger women. Multivariate analyses indicated age by gender interactions on memory for the younger group but not the older group. Results indicate that verbal memory declines with age for younger men but not younger women, whereas both older men and older women show age-related declines. These findings are consistent with hypotheses linking estrogen and verbal memory performance, and with imaging data suggesting that age-related hippocampal atrophy is found in younger men but not younger women. The role of estrogen on cognition in normal aging warrants further study. (JINS, 2003, 9, 97–102.)

Influences of age and gender on human thermoregulatory responses to cold exposures

1985 ◽  
Vol 58 (1) ◽  
pp. 180-186 ◽  
Author(s):  
J. A. Wagner ◽  
S. M. Horvath
Keyword(s):  
Older Women ◽  
Body Fat ◽  
Young Women ◽  
Cold Exposure ◽  
Physiological Responses ◽  
Metabolic Cost ◽  
Older Men ◽  
Age And Gender ◽  
Younger Women ◽  
And Gender

To delineate age- and gender-related differences in physiological responses to cold exposure, men and women between the ages of 20 and 29 yr and 51 and 72 yr, wearing minimal clothing, were exposed at rest for 2 h to 28, 20, 15, and 10 degrees C room temperatures with 40% relative humidity. During the coldest exposure, the rates of increase in metabolic rate (W X m-2 or ml X kg lean body mass-1 X min-1 were similar for all groups. However, older women (n = 7) may have benefited from a larger (P less than 0.05) early metabolic (M) increase (40% within 15 min) than young men (18%) (n = 10), young women (5%) (n = 10), or older men (5%) (n = 10). A similar rapid M response in older women occurred during the 15 degrees C exposure. During all cold exposures, older women maintained constant rectal temperature (Tre) and young women maintained Tre only during the 20 degrees C exposures, whereas Tre of the men declined during all cold exposures (P less than 0.01). Changes in Tre and mean skin temperature (Ts) during cold exposure were largely related to body fat, although age and surface area/mass modified the changes in men. The data suggest that older men are more susceptible to cold ambients than younger people, since they did not prevent a further decline in their initially relatively low Tre. Despite greater insulation from body fat, the older women maintained a constant Tre at greater metabolic cost than men or younger women.

scholarly journals The interaction of age and gender in illness narratives

2008 ◽  
Vol 28 (7) ◽  
pp. 1025-1045 ◽  
Author(s):  
CLIVE SEALE ◽  
JONATHAN CHARTERIS-BLACK
Keyword(s):  
Older Women ◽  
Medical Information ◽  
Elderly Care ◽  
Age Groups ◽  
Older Men ◽  
Family Networks ◽  
Emotional Dimension ◽  
Younger Men ◽  
Research Interviews ◽  
And Gender

ABSTRACTRecognition of the greater capacity of older women to draw on supportive social networks has now supplemented an earlier focus of research into gender and ageing which portrayed older men as a ‘privileged gerontocracy’ because of their greater access to financial resources and spousal care. This study of the experiences of cancer among people of three different age groups conducted a comparative keyword analysis of their narratives to consider the gender differentiation of a third resource: access to medical information and personnel. The analysed narratives were sampled from a large archive of research interviews. It was found that older men with cancer demonstrated a greater involvement with medicine as an expert system than younger men or women or older women. This stemmed from their social confidence when interacting with doctors and their interest in treating their illness as a ‘problem’ to be fixed with medico-scientific solutions. Compared with younger men and women of all ages, older men were less likely to draw on informal social and family networks for support, or to discuss in a direct style the emotional dimension of illness experience. Our findings contrast with other studies that have reported linguistic disadvantage in older people in elderly care settings, which underlines the importance of context for linguistic studies.

scholarly journals Influence of age and gender on upper airway resistance in NREM and REM sleep

2001 ◽  
Vol 90 (3) ◽  
pp. 981-988 ◽  
Author(s):  
Robert Thurnheer ◽  
Peter K. Wraith ◽  
Neil J. Douglas
Keyword(s):  
Airway Resistance ◽  
Age Groups ◽  
Pressure Sensors ◽  
Nrem Sleep ◽  
Older Men ◽  
High Flow ◽  
Low Flow ◽  
Respiratory Resistance ◽  
Age And Gender ◽  
And Gender

The prevalence of irregular breathing during sleep is age and gender dependent, but the reason for this is unknown. This study tested the hypothesis that older men have a greater sleep-related increase in respiratory resistance. In 48 healthy subjects, 12 in each of four groups of younger and older men and women, airway resistance was measured during wakefulness and sleep using a mask, pneumotachograph, and catheter-mounted pressure sensors. Total respiratory resistance and total “low-flow,” and “high-flow” oropharyngeal resistance were analyzed from 170,000 breaths, high flow being at rates above 50% maximal inspiratory flow. High-flow oropharyngeal and total respiratory resistance increased during non-rapid eye movement (NREM) sleep in all groups but not low-flow resistance. Total respiratory resistance increased from 12 ± 1.2 cmH2O · l−1 · s−1awake to 16.2 ± 2.4 in NREM sleep in young men, from 22.8 ± 3.6 to 33.6 ± 5.4 in young women, from 18 ± 3 to 34.8 ± 4.8 in older men, and from 26.6. ± 4.2 to 34.2 ± 6 in older women. The percentage of change in total respiratory resistance from awake to NREM sleep was not different between age groups or genders. We conclude that there are no major age or gender differences in the changes in airway resistance with sleep in normal subjects.

Osteoporosis Health Beliefs Among Younger and Older Men and Women

2006 ◽  
Vol 35 (5) ◽  
pp. 721-733 ◽  
Author(s):  
C. Shanthi Johnson ◽  
William McLeod ◽  
Laura Kennedy ◽  
Katherine McLeod
Keyword(s):  
Health Beliefs ◽  
Age Groups ◽  
Health Belief ◽  
Cross Sectional ◽  
Age And Gender ◽  
Health Motivation ◽  
Younger Women ◽  
Perceived Seriousness ◽  
And Gender ◽  
Gender Groups

The purpose of this study was to compare osteoporosis health beliefs among different age and gender groups. This study used a cross-sectional design, involved 300 participants that represent both genders and three age groups (18 to 25, 30 to 50, and 50-plus), and assessed osteoporosis health beliefs using the Osteoporosis Health Belief Scale (OHBS). Factor analysis revealed three subscales of OHBS: perceived susceptibility, seriousness of the condition, and health motivation to take preventative actions with acceptable levels of reliability. Significant age and gender differences were observed in the susceptibility scores of the OHBS. The perceived seriousness of the osteoporosis scores was similar across all age and gender groups, as was health motivation. These results highlight the need for osteoporosis awareness programs targeting different aspects of belief perceptions, specifically for younger women and men.

Leg blood flow during submaximal cycle ergometry is not reduced in healthy older normally active men

2003 ◽  
Vol 94 (5) ◽  
pp. 1859-1869 ◽  
Author(s):  
David N. Proctor ◽  
Sean C. Newcomer ◽  
Dennis W. Koch ◽  
Khoi U. Le ◽  
David A. MacLean ◽  
...  
Keyword(s):  
Blood Flow ◽  
Cardiac Output ◽  
Femoral Vein ◽  
Plasma Catecholamines ◽  
Older Men ◽  
Constant Load ◽  
Cycle Ergometry ◽  
Leg Blood Flow ◽  
Younger Men ◽  
Power Outputs

The purpose of the present study was to test the hypothesis that leg blood flow responses during submaximal cycle ergometry are reduced with age in healthy normally active men. Eleven younger (20–25 yr) and eight older (62–73 yr) normotensive, nonendurance-trained men performed both graded and constant-load bouts of leg cycling at the same absolute and relative [% of peak O2 consumption (V˙o 2 peak)] exercise intensities while leg blood flow (femoral vein thermodilution), mean arterial pressure (MAP; radial artery), cardiac output (acetylene rebreathing), blood O2 content, and plasma catecholamines were measured. Leg blood flow responses at the same absolute submaximal power outputs (20–100 W) and at a fixed systemic O2 demand (1.1 l/min) did not differ between groups ( P = 0.14–0.19), despite lower absolute levels of cardiac output in the older men ( P < 0.05). MAP at the same absolute power outputs was 8–12 mmHg higher ( P < 0.05) in the older men, but calculated leg vascular conductance responses (leg blood flow/MAP) were identical in the two groups ( P > 0.9). At the same relative intensity (60% V˙o 2 peak), leg norepinephrine spillover rates were approximately twofold higher in the older men ( P = 0.38). Exercise-induced increases in leg arterial-venous O2difference were identical between groups ( P > 0.9) because both arterial and venous O2 contents were lower in the older vs. younger men. These results suggest that the ability to augment active limb blood flow and O2 extraction during submaximal large muscle mass exercise is not impaired but is well preserved with age in healthy men who are normally active.

The Influence of Age and Gender on Mandibular Indices among the Libyan Population

2019 ◽  
Vol 3 (2) ◽  
Keyword(s):  
Negative Correlation ◽  
Bone Mineralization ◽  
Age Groups ◽  
T Test ◽  
Chi Square ◽  
Age And Gender ◽  
Significant Difference ◽  
Chi Square Test ◽  
And Gender ◽  
Libyan Population

Radiographic Mandibular Indices serve as easy and relatively cheap tools for evaluating bone mineralization. Objectives: To examine the effect of age and gender on three mandibular indices: the panoramic mandibular index (PMI), the mandibular ratio (MR) and the mandibular cortical index (MCI), among Libyan population. Methods: The three indices were measured on 317 digital (OPGs) of adult humans (155 males, 162 females). The sample was divided into six age groups (from 18-25 years through 56-65 years). The measurements were analyzed for interactions with age and sex, using SPSS (Statistical Package for Social Studies) software version no. 22. The tests employed were two way ANOVA, the unpaired T-test and chi-square test. Results: The mean PMI fluctuated between 0.37 s.d. 0.012 and 0.38 s.d. 0.012. among the sixth age groups. One-way ANOVA statistical test revealed no significant of age on PMI. On the other hand gender variation has effect on PMI, since independent sample t-test disclosed that the difference between the male and female PMI means statistically significant. ANOVA test showed that the means of MR among age groups showed a negative correlation i.e. MR mean declined from 3.01 in 18-25 age groups to 2.7 in 55-65 age groups. In contrary, the gender showed no effect on MR according two sample t-test at p> 0.05. In regards with MCI, statistical analysis showed that it affected by age that is C1 was decreasing by age while C2 and C3 were increased by age. Using chi square test the result indicated that there is a significant difference among the different age group and the two genders in MCI readings. Conclusion: PMI was influenced significantly by age but minimally by the gender. MR is not affected by gender but has a negative correlation with age. MCI is affected by both age and gender

Children’s Lives and Deaths in Merovingian Gaul

2020 ◽  
pp. 185-213
Author(s):  
Émilie Perez
Keyword(s):  
Social Identity ◽  
Age Groups ◽  
New Method ◽  
Recent Analysis ◽  
Age And Gender ◽  
The Past ◽  
And Gender ◽  
Grave Goods

The role of children in Merovingian society has long been downplayed, and the study of their graves and bones has long been neglected. However, during the past fifteen years, archaeologists have shown growing interest in the place of children in Merovingian society. Nonetheless, this research has not been without challenges linked to the nature of the biological and material remains. Recent analysis of 315 children’s graves from four Merovingian cemeteries in northern Gaul (sixth to seventh centuries) allows us to understand the modalities of burial ritual for children. A new method for classifying children into social age groups shows that the type, quality, quantity, and diversity of grave goods were directly correlated with the age of the deceased. They increased from the age of eight and particularly around the time of puberty. This study discusses the role of age and gender in the construction and expression of social identity during childhood in the Merovingian period.

Age and gender differences in socially aversive (“dark”) personality traits

2021 ◽  
pp. 089020702098843
Author(s):  
Johanna Hartung ◽  
Martina Bader ◽  
Morten Moshagen ◽  
Oliver Wilhelm
Keyword(s):  
Personality Traits ◽  
Structural Equation ◽  
Age Groups ◽  
Dark Triad ◽  
Equation Modeling ◽  
Model Parameters ◽  
Age And Gender ◽  
Measurement Models ◽  
And Gender ◽  
Latent Means

The strong overlap of personality traits discussed under the label of “dark personality” (e.g., psychopathy, spitefulness, moral disengagement) endorses a common framework for socially aversive traits over and beyond the dark triad. Despite the rapidly growing research on socially aversive traits, there is a lack of studies addressing age-associated differences in these traits. In the present study ( N = 12,501), we investigated the structure of the D Factor of Personality across age and gender using local structural equation modeling, thereby expressing the model parameters as a quasi-continuous, nonparametric function of age. Specifically, we evaluated loadings, reliabilities, factor (co-)variances, and means across 35 locally weighted age groups (from 20 to 54 years), separately for females and males. Results indicated that measurement models were highly stable, thereby supporting the conceptualization of the D factor independent of age and gender. Men exhibited uniformly higher latent means than females and all latent means decreased with increasing age. Overall, D and its themes were invariant across age and gender. Therefore, future studies can meaningfully pursue causes of mean differences across age and between genders.

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