Age and Sex Differences in Blood Lactate Response to Sprint Running in Elite Master Athletes

2005 ◽  
Vol 30 (6) ◽  
pp. 647-665 ◽  
Author(s):  
Marko T. Korhonen ◽  
Harri Suominen ◽  
Antti Mero
Keyword(s):  
Sex Differences ◽  
Blood Lactate ◽  
Lactate Concentration ◽  
Key Words Aging ◽  
Master Athletes ◽  
Cross Sectional ◽  
Men And Women ◽  
Sprint Running ◽  
Age Related ◽  
Age And Sex

The effect of age and sex on anaerobic glycolytic capacity in master athletes is currently unclear. To study this issue, we determined blood lactate concentrations after competitive sprint running in male and female master athletes of different age. Eighty-one men (40-88 yrs) and 75 women (35-87 yrs) participating in the sprint events (100-m, 200-m, 400-m) in the European Veterans Athletics Championships were studied. Blood samples were taken from the fingertip and analysed for peak lactate concentration ([La]bpeak). The [La]bpeak following 100-m to 400-m races showed a curvilinear decline (p <  0.001-0.05) with age in both men and women. However, the age related differences in the [La]bpeak were not significant before 70 years of age. No significant sex related differences were found in [La]bpeak for any sprint event. The [La]bpeak correlated significantly (p <  0.001-0.05) with running times in all sprint distances except for the age-controlled correlation in men for the 100-m and 200-m. In conclusion, the present study showed age but not sex differences in blood lactate response to competitive sprint running in master athletes. Although the [La]bpeak level of the athletes was considerably higher than that reported for untrained men and women, these cross-sectional findings suggest that anaerobic energy production from glycolysis declines in later years and may be a factor in the deterioration in sprint performance. Key words: aging, anaerobic metabolism, exercise performance

scholarly journals ET-1 as a Sex-Specific Mechanism Impacting Age-Related Changes in Vascular Function

2021 ◽  
Vol 2 ◽  
Author(s):  
Andrew V. Kuczmarski ◽  
Laura M. Welti ◽  
Kerrie L. Moreau ◽  
Megan M. Wenner
Keyword(s):  
Sex Differences ◽  
Vascular Function ◽  
Cardiovascular Health ◽  
Vascular Dysfunction ◽  
Developed Countries ◽  
Therapeutic Interventions ◽  
Vascular Aging ◽  
Cvd Risk ◽  
Men And Women ◽  
Age Related

Aging is a primary risk factor for cardiovascular disease (CVD), which is the leading cause of death in developed countries. Globally, the population of adults over the age of 60 is expected to double by the year 2050. CVD prevalence and mortality rates differ between men and women as they age in part due to sex-specific mechanisms impacting the biological processes of aging. Measures of vascular function offer key insights into cardiovascular health. Changes in vascular function precede changes in CVD prevalence rates in men and women and with aging. A key mechanism underlying these changes in vascular function is the endothelin (ET) system. Studies have demonstrated sex and sex hormone effects on endothelin-1 (ET-1), and its receptors ETA and ETB. However, with aging there is a dysregulation of this system resulting in an imbalance between vasodilation and vasoconstriction. Thus, ET-1 may play a role in the sex differences observed with vascular aging. While most research has been conducted in pre-clinical animal models, we describe more recent translational data in humans showing that the ET system is an important regulator of vascular dysfunction with aging and acts through sex-specific ET receptor mechanisms. In this review, we present translational evidence (cell, tissue, animal, and human) that the ET system is a key mechanism regulating sex-specific changes in vascular function with aging, along with therapeutic interventions to reduce ET-mediated vascular dysfunction associated with aging. More knowledge on the factors responsible for the sex differences with vascular aging allow for optimized therapeutic strategies to attenuate CVD risk in the expanding aging population.

Changes in the Human Vocal Tract Due to Aging and the Acoustic Correlates of Speech Production

2003 ◽  
Vol 46 (3) ◽  
pp. 689-701 ◽  
Author(s):  
Steve An Xue ◽  
Grace Jianping Hao
Keyword(s):  
Speech Production ◽  
Vocal Tract ◽  
Cost Effective ◽  
The Elderly ◽  
Cross Sectional ◽  
Men And Women ◽  
Acoustic Reflection ◽  
Dimensional Changes ◽  
Formant Frequencies ◽  
Age Related

This investigation used a derivation of acoustic reflection (AR) technology to make cross-sectional measurements of changes due to aging in the oral and pharyngeal lumina of male and female speakers. The purpose of the study was to establish preliminary normative data for such changes and to obtain acoustic measurements of changes due to aging in the formant frequencies of selected spoken vowels and their long-term average spectra (LTAS) analysis. Thirty- eight young men and women and 38 elderly men and women were involved in the study. The oral and pharyngeal lumina of the participants were measured with AR technology, and their formant frequencies were analyzed using the Kay Elemetrics Computerized Speech Lab. The findings have delineated specific and similar patterns of aging changes in human vocal tract configurations in speakers of both genders. Namely, the oral cavity length and volume of elderly speakers increased significantly compared to their young cohorts. The total vocal tract volume of elderly speakers also showed a significant increment, whereas the total vocal tract length of elderly speakers did not differ significantly from their young cohorts. Elderly speakers of both genders also showed similar patterns of acoustic changes of speech production, that is, consistent lowering of formant frequencies (especially F1) across selected vowel productions. Although new research models are still needed to succinctly account for the speech acoustic changes of the elderly, especially for their specific patterns of human vocal tract dimensional changes, this study has innovatively applied the noninvasive and cost-effective AR technology to monitor age-related human oral and pharyngeal lumina changes that have direct consequences for speech production.

Emotional Control in Adulthood

1997 ◽  
Vol 80 (2) ◽  
pp. 499-507 ◽  
Author(s):  
Jasmin Tahmaseb McConatha ◽  
Frances Marshall Leone ◽  
Jill M. Armstrong
Keyword(s):  
Older Adults ◽  
Sex Differences ◽  
Emotional Control ◽  
Emotional Intensity ◽  
Socioemotional Selectivity Theory ◽  
Emotional Experiences ◽  
Men And Women ◽  
Socioemotional Selectivity ◽  
Similarities And Differences ◽  
Age And Sex

Although it is widely believed that emotions vary with age, there is a dearth of information on emotional experiences in later adulthood. Several researchers think that older adults experience less emotional intensity than younger people while others have suggested that aging is accompanied by a decrease in positive affect and an increase in negative emotions. Sex similarities and differences in emotionality have also been documented. This study focuses on age and sex similarities and differences in emotional control. Three hundred and twenty seven men and women aged 19 to 92 years were administered two emotion measures. The results support previous research which suggests that the control of emotions increases with age. In evaluating sex differences in emotional control, women scored as more emotionally expressive than men, a finding which is consistent with previous research. Results are discussed in relation to socioemotional selectivity theory.

scholarly journals Blood lactate increases with the progression of mitral valve disease in dogs

2018 ◽  
Vol 38 (9) ◽  
pp. 1781-1786
Author(s):  
Jorge Cardoso Silva-Filho ◽  
Marlos G. Sousa ◽  
Evandro Zacché Pereira ◽  
Edna M.G. Ortiz ◽  
Rodrigo P. Franco ◽  
...  
Keyword(s):  
Heart Failure ◽  
Congestive Heart Failure ◽  
Mitral Valve ◽  
Blood Lactate ◽  
Cardiac Remodeling ◽  
Mitral Valve Disease ◽  
Lactate Concentration ◽  
Tissue Perfusion ◽  
Valve Disease ◽  
Cross Sectional

ABSTRACT: In dogs with congestive heart failure, the upregulated sympathetic tone causes vasoconstriction that impairs peripheral blood supply, therefore causing the accumulation of lactate. In this prospective cross-sectional study with a longitudinal component, blood lactate was quantified in 10 healthy and 34 myxomatous mitral valve disease (MMVD) dogs to investigate its potential use as a diagnostic and prognostic biomarker. While there were no differences in lactate concentration between control animals and stages B1 (3.31±0.62mmol/L) and B2 (3.32±0.46mmol/L) dogs, significant differences were found between healthy (2.50±0.69mmol/L) and both C (3.99±0.47mmol/L) and D (6.97±1.23mmol/L) animals. When a cut-off of 3.35mmol/L was used, lactate was able to distinguish dogs with normal and remodeled hearts with a sensitivity of 78.2% and specificity of 63.6%. Also, significant correlations existed between lactate and indicators of cardiac remodeling. Finally, animals with blood lactate <3.5mmol/L carried a better prognosis when compared with dogs in which lactate was >5.0mmol/L. Our results suggest that the progression of MMVD results in accumulation of lactate within the bloodstream, which is likely attributable to the impaired peripheral tissue perfusion. In MMVD dogs, blood lactate may be used as a surrogate for cardiac remodeling, and an increased concentration is associated with a worse prognosis regarding the time to evolve into congestive heart failure.

The effect of age and sex on clustering and switching during speeded verbal fluency tasks

2009 ◽  
Vol 15 (2) ◽  
pp. 196-204 ◽  
Author(s):  
SHAWNDA LANTING ◽  
NICOLE HAUGRUD ◽  
MARGARET CROSSLEY
Keyword(s):  
Older Adults ◽  
Sex Differences ◽  
Verbal Fluency ◽  
Verbal Ability ◽  
Past Research ◽  
Strategy Use ◽  
Semantic Fluency ◽  
Age Related ◽  
Fluency Task ◽  
Age And Sex

AbstractPast research has been inconsistent with regard to the effects of normal aging and sex on strategy use during verbal fluency performance. In the present study, both Troyer et al.’s (1997) and Abwender et al.’s (2001) scoring methods were used to measure switching and clustering strategies in 60 young and 72 older adults, equated on verbal ability. Young adults produced more words overall and switched more often during both phonemic and semantic fluency tasks, but performed similarly to older adults on measures of clustering. Although there were no sex differences in total words produced on either fluency task, males produced larger clusters on both tasks, and females switched more frequently than males on the semantic but not on the phonemic fluency task. Although clustering strategies appear to be relatively age-insensitive, age-related changes in switching strategies resulted in fewer overall words produced by older adults. This study provides evidence of age and sex differences in strategy use during verbal fluency tests, and illustrates the utility of combining Troyer’s and Abwender’s scoring procedures with in-depth categorization of clustering to understand interactions between age and sex during semantic fluency tasks. (JINS, 2009, 15, 196–204.)

A cross-sectional study of age-related loss of mineral content of phalangeal bone in men and women

1988 ◽  
Vol 17 (5) ◽  
pp. 338-343 ◽  
Author(s):  
Willem Th. Trouerbach ◽  
Jan C. Birkenhäger ◽  
Paul I. M. Schmitz ◽  
Albert M. van Hemert ◽  
Jan L. C. M. van Saase ◽  
...  
Keyword(s):  
Mineral Content ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Men And Women ◽  
Age Related ◽  
Phalangeal Bone

scholarly journals Contributing Determinants to Hearing Loss in Elderly Men and Women: Results from the Population-Based Rotterdam Study

2016 ◽  
Vol 21 (Suppl. 1) ◽  
pp. 10-15 ◽  
Author(s):  
Stephanie C. Rigters ◽  
Mick Metselaar ◽  
Marjan H. Wieringa ◽  
Robert J. Baatenburg de Jong ◽  
Albert Hofman ◽  
...  
Keyword(s):  
Hearing Loss ◽  
High Frequency ◽  
Pure Tone Audiometry ◽  
Inverse Correlation ◽  
Population Based ◽  
Rotterdam Study ◽  
Cross Sectional ◽  
Men And Women ◽  
Age Related ◽  
Age Related Hearing Loss

To contribute to a better understanding of the etiology in age-related hearing loss, we carried out a cross-sectional study of 3,315 participants (aged 52-99 years) in the Rotterdam Study, to analyze both low- and high-frequency hearing loss in men and women. Hearing thresholds with pure-tone audiometry were obtained, and other detailed information on a large number of possible determinants was collected. Hearing loss was associated with age, education, systolic blood pressure, diabetes mellitus, body mass index, smoking and alcohol consumption (inverse correlation). Remarkably, different associations were found for low- and high-frequency loss, as well as between men and women, suggesting that different mechanisms are involved in the etiology of age-related hearing loss.

scholarly journals Sex differences in estimated brain metabolism in relation to body growth through adolescence

2017 ◽  
Vol 39 (3) ◽  
pp. 524-535 ◽  
Author(s):  
Simon N Vandekar ◽  
Haochang Shou ◽  
Theodore D Satterthwaite ◽  
Russell T Shinohara ◽  
Alison K Merikangas ◽  
...  
Keyword(s):  
Sex Differences ◽  
Brain Metabolism ◽  
Nonlinear Models ◽  
Body Growth ◽  
Developmental Changes ◽  
Cross Sectional ◽  
Age Related ◽  
Positron Emission ◽  
Developmental Age ◽  
Maximum Body

The human brain consumes a disproportionate amount of the body’s overall metabolic resources, and evidence suggests that brain and body may compete for substrate during development. Using perfusion MRI from a large cross-sectional cohort, we examined developmental changes of MRI-derived estimates of brain metabolism, in relation to weight change. Nonlinear models demonstrated that, in childhood, changes in body weight were inversely related to developmental age-related changes in brain metabolism. This inverse relationship persisted through early adolescence, after which body and brain metabolism began to decline. Females achieved maximum body growth approximately two years earlier than males, with a correspondingly earlier stabilization of brain metabolism to adult levels. These findings confirm prior findings with positron emission tomography performed in a much smaller cohort, demonstrate that relative brain metabolism can be inferred from noninvasive MRI data, and extend observations on the associations between body growth and brain metabolism to sex differences through adolescence.

Muscle CSA, Force Production, and Activation of Leg Extensors during Isometric and Dynamic Actions in Middle-Aged and Elderly Men and Women

1998 ◽  
Vol 6 (3) ◽  
pp. 232-247 ◽  
Author(s):  
Keijo Häkkinen ◽  
Markku Alen ◽  
Mauri Kallinen ◽  
Mikel Izquierdo ◽  
Kirsi Jokelainen ◽  
...  
Keyword(s):  
Isometric Force ◽  
Age Groups ◽  
Voluntary Activation ◽  
Maximal Strength ◽  
Power Performance ◽  
Time Duration ◽  
Cross Sectional ◽  
Men And Women ◽  
Age Related ◽  
Leg Extensors

Forty-two healthy men and women in two age groups (40 and 70 years) were examined for muscle cross-sectional area (CSA), maximal voluntary bilateral isometric force, force-time characteristics, maximal concentric 1 RM. and power performance of the leg extensors in a sitting position, squat jump, and standing long-jump. The results suggested that the decline in maximal strength with increasing age is related to the decline in muscle CSA; however, particularly in older women, the force/CSA ratio may also be lowered. Explosive force seems to decrease with increasing age even more than maximal strength. suggesting that muscle atrophy with aging is greater in fast-twitch fibers. The voluntary activation of the agonist and antagonist muscles seems to vary depending on the type of muscle action and/or velocity and time duration of the action in both age groups but to a greater extent in older people. There appears to be an age-related increase in antagonist co activation. especially in dynamic explosive movements.

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