scholarly journals Isometric, Eccentric, and Concentric Strength in Trained and Untrained Older Adults: A Pilot Study

2021 ◽  
Vol 9 (4) ◽  
pp. 13
Author(s):  
Fernando Rosete ◽  
Lorrie Brilla ◽  
David N. Suprak ◽  
Erik T. Hummer ◽  
Jun G. San Juan
Keyword(s):  
Older Adults ◽  
Resistance Training ◽  
Rank Order ◽  
Knee Extensor ◽  
Older Individuals ◽  
Trained Group ◽  
Ex Post ◽  
Peak Knee ◽  
Quasi Experimental ◽  
The Impact

Background: Despite an overall decrease in muscular strength, older adults maintain eccentric (ECC) strength in greater proportions compared to isometric (ISO) and concentric (CON) strength. While resistance training is promoted for older adults, the impact of resistance training on ISO, ECC, and CON strength is relatively unknown. Objective: The purpose of this study was to compare peak ISO, ECC and CON knee extensor moments between trained and untrained older individuals. Methods: A quasi-experimental design with a two-group comparison, ex post facto, was conducted. Twenty older adults (8 females, 69.6 ± 6.1 years, 80.5 ± 16.4 kg, 1.7 ± 0.1 m) were allocated to two groups, one undergoing resistance training (n =10) and one not (n = 10). An isokinetic dynamometer measured ISO, ECC, and CON knee extensor moments. Peak knee extensor moments (Nm) and ECC: ISO ratio were analyzed using a Kruskal-Wallis test (α = 0.05). Spearman Rank-Order Correlations were run on paired combinations of peak ISO, ECC, and CON moments for both groups. Results: The trained group had significantly greater peak ISO moment (183.8 vs 137.1 Nm, p = 0.013, d = 1.3) but significantly lower ECC: ISO ratio (p = 0.028, d = 1.1). The trained group exhibited stronger correlations for ECC-ISO (rs = 0.79 vs. 0.65), ECC-CON (rs = 0.93 vs. 0.59), and CON-ISO (rs = 0.93 vs. 0.78) compared to the untrained group. Conclusions: The findings demonstrate older adults maintain eccentric and concentric strength, regardless of training status. However, trained participants had a more balanced ECC: ISO ratio, due to their increased peak ISO strength possibly due to their resistance training.

scholarly journals Influence of acetaminophen and ibuprofen on in vivo patellar tendon adaptations to knee extensor resistance exercise in older adults

2011 ◽  
Vol 111 (2) ◽  
pp. 508-515 ◽  
Author(s):  
C. C. Carroll ◽  
J. M. Dickinson ◽  
J. K. LeMoine ◽  
J. M. Haus ◽  
E. M. Weinheimer ◽  
...  
Keyword(s):  
Older Adults ◽  
Placebo Group ◽  
Resistance Training ◽  
Patellar Tendon ◽  
Signal Intensity ◽  
Knee Extensor ◽  
Older Individuals ◽  
Stiffness Modulus ◽  
Peripheral Tissues

Millions of older individuals consume acetaminophen or ibuprofen daily and these same individuals are encouraged to participate in resistance training. Several in vitro studies suggest that cyclooxygenase-inhibiting drugs can alter tendon metabolism and may influence adaptations to resistance training. Thirty-six individuals were randomly assigned to a placebo (67 ± 2 yr old), acetaminophen (64 ± 1 yr old; 4,000 mg/day), or ibuprofen (64 ± 1 yr old; 1,200 mg/day) group in a double-blind manner and completed 12 wk of knee extensor resistance training. Before and after training in vivo patellar tendon properties were assessed with MRI [cross-sectional area (CSA) and signal intensity] and ultrasonography of patellar tendon deformation coupled with force measurements to obtain stiffness, modulus, stress, and strain. Mean patellar tendon CSA was unchanged ( P > 0.05) with training in the placebo group, and this response was not influenced with ibuprofen consumption. Mean tendon CSA increased with training in the acetaminophen group (3%, P < 0.05), primarily due to increases in the mid (7%, P < 0.05) and distal (8%, P < 0.05) tendon regions. Correspondingly, tendon signal intensity increased with training in the acetaminophen group at the mid (13%, P < 0.05) and distal (15%, P = 0.07) regions. When normalized to pretraining force levels, patellar tendon deformation and strain decreased 11% ( P < 0.05) and stiffness, modulus, and stress were unchanged ( P > 0.05) with training in the placebo group. These responses were generally uninfluenced by ibuprofen consumption. In the acetaminophen group, tendon deformation and strain increased 20% ( P < 0.05) and stiffness (−17%, P < 0.05) and modulus (−20%, P < 0.05) decreased with training. These data suggest that 3 mo of knee extensor resistance training in older adults induces modest changes in the mechanical properties of the patellar tendon. Over-the-counter doses of acetaminophen, but not ibuprofen, have a strong influence on tendon mechanical and material property adaptations to resistance training. These findings add to a growing body of evidence that acetaminophen has profound effects on peripheral tissues in humans.

Comparisons of Knee Extensor Functional Demand During Gait by Age, Physical Activity Level, and the Impact of Acute Exercise and Walking Speed

2020 ◽  
Vol 36 (3) ◽  
pp. 163-170
Author(s):  
Jocelyn F. Hafer ◽  
Katherine A. Boyer
Keyword(s):  
Physical Activity ◽  
Older Adults ◽  
Young Adults ◽  
Acute Exercise ◽  
Walking Speed ◽  
Knee Extensor ◽  
Extensor Muscle ◽  
Activity Level ◽  
Peak Knee ◽  
The Impact

The link between age-related changes in muscle strength and gait is unclear. We tested if knee extensor functional demand differs by age and physical activity status and if functional demand increases with walking speed or after exercise. Gait and knee extensor muscle torque were collected from young adults and highly and less active older adults before and after treadmill walking. Functional demand was the ratio of knee moments during gait to knee extensor muscle torques estimated from participant-specific torque–velocity curves. Functional demand at the peak knee flexion moment was greater in less active older adults than young adults (29.3% [14.3%] vs 24.6% [12.1%]) and increased with walking speed (32.0% [13.9%] vs 22.8% [10.4%]). Functional demand at both knee extension moments increased ∼2% to 3% after exercise. The low functional demand found in this study suggests that healthy adults maintain a reserve of knee extensor strength.

scholarly journals Effects of resistance training on self-reported disability in older adults with functional limitations or disability – a systematic review and meta-analysis

2019 ◽  
Vol 16 (1) ◽  
Author(s):  
Pia Øllgaard Olsen ◽  
Anne-Ditte Termannsen ◽  
Maja Bramming ◽  
Mark A. Tully ◽  
Paolo Caserotti
Keyword(s):  
Older Adults ◽  
Resistance Training ◽  
Muscle Strength ◽  
Functional Capacity ◽  
Meta Analysis ◽  
Functional Limitations ◽  
Knee Extensor ◽  
Objective Measures ◽  
Lower Body ◽  
Positive Effect

Abstract Background Self-reported disability has a strong negative impact on older people’s quality of life and is often associated with the need for assistance and health care services. Resistance training (RT) has been repeatedly shown to improve muscle function (e.g. strength) and functional capacity (e.g. gait speed, chair-rise) in older adults with functional limitations. Nevertheless, it is unclear whether such objectively assessed improvements translate into a reduction in self-reported disability. Objectives To assess: i) whether and to what extent RT interventions have an effect on self-reported disability in older adults (≥65 years) with functional limitations or disability; and ii) whether the effects on self-reported disability are associated with changes in objective measures of muscle strength and functional capacity across studies. Methods PubMed, Embase, Web of Science, CINAHL and SPORTDiscus electronic databases were searched in June 2018. Randomized controlled trials reporting effects of RT on self-reported disability/function in ≥65 year-old adults with defined, functional limitations or self-reported disability were eligible. Data on self-reported disability/function were pooled by calculating adjusted standardized mean differences (SMD) using Hedges’g. Likewise, effect sizes for three secondary outcomes: knee extensor muscle strength; gait capacity; and lower body functional capacity were calculated and fit as covariates in separate meta-regressions with self-reported disability as the dependent factor. Results Fourteen RCTs were eligible for the primary meta-analysis on self-reported disability. The total number of participants was 651 (intervention n = 354; control n = 297). A significant moderate positive effect of RT was found (SMD: 0.59, 95% CI: 0.253 to 0.925, p = 0.001). Between-study heterogeneity was present (I2 statistic = 75,1%, p <  0.001). RT effects on objective measures of lower body functional capacity were significantly associated with effects on self-reported disability (Adj. R2 = 99%, p = 0.002, n = 12 studies), whereas no significant associations with gait capacity or knee extensor strength were found. Conclusions This review provides evidence that RT has a moderate positive effect on self-reported disability/function in old people with or at risk for disability. The effects are strongly associated with effects on objective measures of lower body functional capacity.

Conclusion

2016 ◽  
Author(s):  
Maria A. Sullivan
Keyword(s):  
Older Adults ◽  
Substance Use ◽  
The Elderly ◽  
Social Consequences ◽  
Individual Therapy ◽  
Older Individuals ◽  
Prescribing Practices ◽  
Elderly Age ◽  
Age Related ◽  
The Impact

Addiction in older adults very often goes unrecognized, for several reasons: social biases about the elderly, age-related metabolic changes, and the inappropriate use of prescription benzodiazepines and opioids to address untreated anxiety and mood conditions. Alcohol or substance-use disorders (SUDs) in older individuals may present in subtle and atypical ways. Strategies to overcome such difficulties include systematic screening using validated instruments, patient education regarding the impact of psychoactive substances on health, and cautious prescribing practices. Relying on standard DSM criteria may result in a failure to detect an SUD that presents with cognitive symptoms or physical injury, as well as the absence of work or social consequences. Older individuals can benefit from the application of risk-stratification measures, and they can be referred, e.g., to age-appropriate group therapy and non-confrontational individual therapy focusing on late-life issues of loss and sources of social support, as well as be offered medication management for alcohol or substance use disorder. Although research has been limited in this population, treatment outcomes have been found to be superior in older adults than younger adults.

Traumatic Stress in Older Adults

2012 ◽  
pp. 118-127
Author(s):  
Joan M. Cook ◽  
Tatyana Biyanova ◽  
Diane L. Elmore
Keyword(s):  
Older Adults ◽  
World War Ii ◽  
Functional Impairment ◽  
Stress Disorder ◽  
Acute Stress ◽  
Age Groups ◽  
Care Utilization ◽  
Older Individuals ◽  
Delayed Recognition ◽  
The Impact

This chapter focuses on older adult trauma survivors. Information is presented on prevalence of acute stress disorder (ASD) and posttraumatic stress disorder (PTSD); course, functional impairment, suicide risk, and health care utilization in older adults with PTSD; and the impact of demographic factors such as gender, ethnicity, and race on PTSD in older individuals. In general, rates of ASD and PTSD are lower in older adults compared to other age groups. PTSD in older adults has been linked to suicidal ideation and attempts, functional impairment, physical health, and increased healthcare utilization. Although delayed onset of PTSD has been empirically verified in some military samples with World War II veterans and younger adult civilians, it is rare in the absence of any prior symptoms and might more accurately be labeled “delayed recognition.” More information on trauma and PTSD in diverse populations of older adults is needed, such as racial and ethnic minorities, those with severe physical or mental impairment, noncommunity-residing groups, and those from nonindustrialized countries.

scholarly journals Improved knee extensor strength with resistance training associates with muscle specific miRNAs in older adults

2015 ◽  
Vol 62 ◽  
pp. 7-13 ◽  
Author(s):  
Tan Zhang ◽  
Alexander Birbrair ◽  
Zhong-Min Wang ◽  
María L. Messi ◽  
Anthony P. Marsh ◽  
...  
Keyword(s):  
Older Adults ◽  
Resistance Training ◽  
Knee Extensor ◽  
Knee Extensor Strength

Nordic Walking Improves Gait Power Profiles at the Knee Joint in Parkinson’s Disease

2018 ◽  
Vol 26 (1) ◽  
pp. 84-88 ◽  
Author(s):  
Lei Zhou ◽  
Marie-Anne Gougeon ◽  
Julie Nantel
Keyword(s):  
Older Adults ◽  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Knee Joint ◽  
Knee Extensor ◽  
Gait Pattern ◽  
Nordic Walking ◽  
Healthy Older Adults ◽  
Functional Gait ◽  
The Impact

We investigated the impact of Nordic walking (NW) on gait patterns in individuals with Parkinson’s disease (PD) following a 6-week NW familiarization. Twelve participants with PD and 12 healthy older adults took part in a gait analysis walking with and without poles (NP). Results showed larger knee power (knee extensor: K2) on the most affected leg in NW compared to NP (P = .01). On the less affected side, larger power absorption (knee extensor: K3) was found during preswing (K3) compared to older adults in both NP and NW (P = 0.01). NW showed longer stride length and single support time (P < .01) compared to NP. Walking with poles improved gait spatial–temporal characteristics and power profiles at the knee joint both on the less and most affected sides in individuals with PD. NW could be beneficial to help regain a more functional gait pattern in PD.

416 The impact of Obstructive Sleep Apnea severity on age-related comorbities: a population-based study

SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A165-A165
Author(s):  
Mayra Silva ◽  
Dalva Poyares ◽  
Luciana Oliveira ◽  
Monica Andersen ◽  
Sergio Tufik ◽  
...  
Keyword(s):  
Older Adults ◽  
Late Onset ◽  
Clinical Manifestations ◽  
Population Based ◽  
Baseline Survey ◽  
Older Individuals ◽  
Blood Tests ◽  
Age Related ◽  
Obstructive Sleep ◽  
The Impact

Abstract Introduction Although age per se has been considered a risk factor for OSA, evidence suggest OSA in older adults may be less severe and OSA diagnostic criteria might be adjusted for this age group. Concurrently, it is likely the late-onset OSA is a distinct phenotype having different pathophysiological mechanisms, as well as clinical manifestations and consequences. We sought to investigate the clinical consequences of OSA severity in older adults from a representative sample of the older population living in the São Paulo city. Methods From the baseline survey including 1042 participants in 2007, 715 were reassessed in 2016 completing full in-lab PSG, health-related questionnaires, blood tests, and blood pressure measurements. Individuals &gt; 60 y.o. (n=199) of both genders were included in the analysis. Participants were stratified according to OSA presence and severity in 3 groups G1 (non and mild OSA n=83); G2 (moderate OSA n=56); G3 (severe OSA n=60). General Linear Model (GLM) tests and Chi-square were carried out. Results Participants mean age was 70.02±7.31 and mean body mass index (BMI) 28.61±5.39, 40.71% of men. The only comorbidity associated with OSA severity was arterial hypertension occurring in 61.7% of G3, 46.4% of G4 and 41% of G1 (p=0.04). Severe OSA participants were more likely to use a higher (&gt;2/day) number of medications (p=0.03). Finally, out of all blood tests only cortisol was significantly higher in severe OSA group (p&lt;0.001) Conclusion Severe OSA in older individuals of the general population is not associated with metabolic conditions, such as diabetes, but it was associated with hypertension. Severe OSA may be a stressful condition, since it was associated with higher cortisol in this population. Support (if any) Associaçao Fundo Incentivo a Pesquisa (AFIP)

Exercise in later life: the older adults' perspective about resistance training

2011 ◽  
Vol 31 (8) ◽  
pp. 1330-1349 ◽  
Author(s):  
TIM HENWOOD ◽  
ANTHONY TUCKETT ◽  
OFFER EDELSTEIN ◽  
HELEN BARTLETT
Keyword(s):  
Older Adults ◽  
Resistance Training ◽  
Health Effect ◽  
Later Life ◽  
Functional Health ◽  
Current Evidence ◽  
Public Knowledge ◽  
Older Individuals ◽  
Muscular System ◽  
Personal Experiences

ABSTRACTFor older adults, exercise that challenges the muscular system, commonly referred to as resistance training, has significant physical, psychometrical and functional benefits. While well recognised by the scientific community, the translation of these benefits into practice has received little attention. Particularly neglected is an understanding of the personal experiences, motivation towards and adherence to resistance training recommendations among older adults. This paper investigated the benefits older individuals attribute to resistance training and the motivational tactics they employed to undertake it. Data were drawn from three focus groups where participants (⩾65 years; presently, previously or wanting to become involved in a resistance training intervention) were encouraged to openly discuss resistance training, physical activity and exercise. Findings revealed that participants were aware of the benefits of training on general and functional health, and that these benefits were employed in the motivation to train. In addition, presently or previously trained individuals stress the importance of environment and programme structure as a training motivator. The benefits to mental and social health, effect on ageing and body image were also raised. However, participants discussed these in a broad context. While it could be said that public knowledge reflects current evidence, it is also clear that individuals are still unaware of a number of specific benefits.

scholarly journals Responding to policy makers’ evaluation needs: combining experimental and quasi-experimental approaches to estimate the impact of performance based financing in Burkina Faso

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Manuela De Allegri ◽  
Julia Lohmann ◽  
Aurélia Souares ◽  
Michael Hillebrecht ◽  
Saidou Hamadou ◽  
...  
Keyword(s):  
Burkina Faso ◽  
Impact Evaluation ◽  
Real Life ◽  
Analytical Strategy ◽  
Randomized Controlled ◽  
Ex Post ◽  
Performance Based Financing ◽  
Quasi Experimental ◽  
Experimental Approaches ◽  
The Impact

Abstract Background The last two decades have seen a growing recognition of the need to expand the impact evaluation toolbox from an exclusive focus on randomized controlled trials to including quasi-experimental approaches. This appears to be particularly relevant when evaluation complex health interventions embedded in real-life settings often characterized by multiple research interests, limited researcher control, concurrently implemented policies and interventions, and other internal validity-threatening circumstances. To date, however, most studies described in the literature have employed either an exclusive experimental or an exclusive quasi-experimental approach. Methods This paper presents the case of a study design exploiting the respective advantages of both approaches by combining experimental and quasi-experimental elements to evaluate the impact of a Performance-Based Financing (PBF) intervention in Burkina Faso. Specifically, the study employed a quasi-experimental design (pretest-posttest with comparison) with a nested experimental component (randomized controlled trial). A difference-in-differences approach was used as the main analytical strategy. Discussion We aim to illustrate a way to reconcile scientific and pragmatic concerns to generate policy-relevant evidence on the intervention’s impact, which is methodologically rigorous in its identification strategy but also considerate of the context within which the intervention took place. In particular, we highlight how we formulated our research questions, ultimately leading our design choices, on the basis of the knowledge needs expressed by the policy and implementing stakeholders. We discuss methodological weaknesses of the design arising from contextual constraints and the accommodation of various interests, and how we worked ex-post to address them to the best extent possible to ensure maximal accuracy and credibility of our findings. We hope that our case may be inspirational for other researchers wishing to undertake research in settings where field circumstances do not appear to be ideal for an impact evaluation. Trial registration Registered with RIDIE (RIDIE-STUDY-ID-54412a964bce8) on 10/17/2014.

Sign in / Sign up

Export Citation Format

Share Document