Improving Healthcare Quality and Clinical Outcomes for Persons with Dementia in the Sub-Acute Hospital Through Person-Centered Care Practice.

Background: Person-centered care is considered beneficial for persons with dementia. Objective: To evaluate the impact of a person-centered knowledge translation intervention on the quality of healthcare and outcomes for persons with dementia. Methods: Over nine months, sub-acute hospital nursing, allied health, and medical staff (n = 90) participated in online and/or face-to-face person-centered education and were supported by senior nursing, allied health, and medical staff champions (n = 8) to implement person-centered healthcare. The quality of healthcare service, ward climate and care delivery were evaluated pre/post study intervention. In the week following hospital admission (Time 1) and week of discharge (Time 3), agitation incidence (co-primary outcome) was assessed in participants with dementia (n = 80). Participant delirium (co-primary outcome), accidents/injuries, psychotropic medicines, length of stay, readmission and discharge destination (secondary outcomes) were compared with a retrospective group (n = 77) matched on demographics, cognition and function in activities of daily living. Results: Improvements occurred post-intervention in service quality by 17.5% (p = 0.369, phi = 0.08), ward climate by 18.1% (p = 0.291, phi = 0.08), and care quality by 50% (p = 0.000, phi = 0.37). Participant agitation did not change from Time 1 to Time 3 (p = 0.223). Relative to the retrospective group, significant reductions occurred in participant delirium (p = 0.000, phi = 0.73), incidents/injuries (p = 0.000, phi = 0.99), psychotropic medicine use (p = 0.030, phi = 0.09), and hospital readmissions within 30 days (p = 0.002, phi = 0.25), but not in discharge to home (p = 0.171). Conclusions: When person-centered healthcare knowledge is translated through staff education and practice support, persons with dementia can experience improved healthcare services and clinical outcomes, while healthcare services can benefit through reductions in unplanned service use.

Prototype development of the Mental Health benchmarking Industry Tool for residential aged Care (MHICare Tool): a protocol paper of a two-stage sequential and mixed methods codesign study.

OBJECTIVES: Current mental health practices for people living in residential aged care (RAC) facilities are poor. In Australia, there are no mechanisms to monitor and promote mental health for people living in RAC, including those who experience changed behaviours and psychological symptoms. The aim of this study is to improve current practices and mental health outcomes for people living in RAC facilities by codesigning a Mental Health benchmarking Industry Tool for residential aged Care (MHICare Tool). METHODS: A two-stage sequential and mixed methods codesign methodology will be used. Stage 1 will include qualitative interviews and focus groups to engage with residents, family/care partners and RAC staff to ascertain mental healthcare practices and outcomes of greatest significance to them. Adapted concept mapping methods will be used to rank identified issues of concern in order of importance and changeability, and to generate draft quality indicators. Stage 2 will comprise a Delphi procedure to gain the wider consensus of expert panel views (aged care industry, academic, clinical) on the performance indicators to be included, resulting in the codesigned MHICare Tool. ETHICS AND DISSEMINATION: This study has been reviewed and approved by the University of Queensland Human Research Ethics Committee (HREC/2019002096). This project will be carried out according to the National Statement on Ethical Conduct in Human Research (2007). The study's findings will be published in peer-reviewed journals and disseminated at national and international conferences and through social media. CONCLUSION: This protocol reports structured methods to codesign and develop a mental health performance indicator tool for use in Australian RAC.

Physical restraint in older people: a statement from the Early Career Network of the International Psychogeriatric Association.

The International Psychogeriatric Association (IPA) has expressed significant concerns over the use of physical restraints in older people across diverse aged care settings. Following an extensive analysis of the available literature, the IPA's Early Career Network (ECN) has formulated a collection of evidence-based recommendations aimed at guiding the use of physical restraints within various care contexts and demographic groups. Physical restraints not only infringe upon human rights but also raise significant safety concerns that adversely impact the physical, psychological, social, and functional well-being of older adults. Furthermore, their effectiveness in geriatric settings remains inadequate. Given these considerations, the IPA and its ECN firmly assert that the use of physical restraints should only be considered as a final recourse in the care of older people.

Nonpharmacological approaches for pain and symptoms of depression in people with osteoarthritis: systematic review and meta-analyses.

People with osteoarthritis often experience pain and depression. These meta-analyses examined and compared nonpharmacological randomized controlled trials (RCTs) for pain and symptoms of depression in people living with osteoarthritis. RCTs published up until April 2022 were sourced by searching electronic databases EMBASE, PUBMED & MEDLINE, Web of Science, CINAHL and PEDro. Random-effects meta-analyses were performed to calculate pooled effect sizes (ES) and 95% confidence intervals (CI) for pain and depression. Subgroup analyses examined intervention subtypes. For pain, 29 interventions (n = 4382; 65 ± 6.9 years; 70% female), revealed a significant effect on reducing pain (ES = 0.43, 95% CI [0.25, 0.61], p < 0.001). Effect sizes were significant (p < 0.001) for movement meditation (ES = 0.52; 95% CI [0.35, 0.69]), multimodal approaches (ES = 0.37; 95% CI [0.22, 0.51]), and psychological therapy (ES = 0.21; 95% CI [0.11, 0.31]), and significant (p = 0.046) for resistance exercise (ES = 0.43, 95% CI [- 0.07, 0.94]. Aerobic exercise alone did not improve pain. For depression, 28 interventions (n = 3377; 63 ± 7.0 years; 69% female), revealed a significant effect on reducing depressive symptoms (ES = 0.29, 95% CI [0.08, 0.49], p < 0.001). Effect sizes were significant for movement meditation (ES = 0.30; 95% CI [0.06, 0.55], p = 0.008) and multimodal interventions (ES = 0.12; 95% CI [0.07, 0.18], p < 0.001). Resistance/aerobic exercise or therapy alone did not improve depressive symptoms. Mind-body approaches were more effective than aerobic/resistance exercise or therapy alone for reducing pain and depression in people with osteoarthritis.Systematic review registration: PROSPERO CRD42022338051.

Evaluating Implementation and Outcomes of a Person-Centered Care Model for People with Dementia in the Rehabilitation In-Patient Setting: Project Protocol.

BACKGROUND: While Australian guidelines promote person-centered healthcare (PCC) for persons with dementia, healthcare systems, routines, rules, and workplace cultures can pose challenges in the provision of PCC. OBJECTIVE: To present a knowledge translation protocol of the PCC model in a sub-acute rehabilitation hospital. METHODS: The two-year pre/post/follow-up translation project will include (n = 80) persons with dementia, (n = 80) adult family/carers of patient participants, (n = 60) healthcare staff (medical, nursing, allied health), and (n = 8) PCC staff champions. Champions will complete six half-days' training in PCC. Medical, nursing, and allied health staff will be provided with PCC learning manuals, complete six hours of online PCC education and attend six face-to-face PCC education sessions. Champions will provide ongoing support to staff in PCC practice. The Reach, Effectiveness, Adoption, Implementation, and Maintenance (RE-AIM) framework will be used to evaluate: i) outcomes for prospective patients provided with PCC, compared with a matched sample of retrospective patients (primary outcomes agitation incidence and severity); 2) champion and staff PCC knowledge, confidence, engagement, and practice quality; 3) person, family/carer, champion, and staff satisfaction with PCC; 4) PCC costs and benefits; and 5) organizational structures, systems and policies required to implement and maintain PCC in sub-acute healthcare. RESULTS: We will identify if PCC benefits persons with dementia, staff, and healthcare services, and we will generate evidence on the educational and organizational resources required to embed PCC in practice. CONCLUSION: Project findings will inform tailored PCC education applications for dissemination in healthcare and produce evidence-based PCC practice guidelines to improve healthcare for persons with dementia.

Views of people living with dementia and their families/care partners: helpful and unhelpful responses to behavioral changes.

OBJECTIVES: This study investigated the views of people living with dementia and their families/care partners on (i) what they find helpful or unhelpful regarding behavioral changes, i.e. which coping strategies they used for themselves and/or which responses from others, and (ii) what they consider to be appropriate terminology to describe behavioral changes. DESIGN & SETTING: One-on-one semi-structured interviews were conducted with people living with dementia and families/care partners face to face, online, or over the telephone. MEASUREMENTS: Data from open-ended questions were analyzed inductively. Common themes were derived from the data using an iterative approach. RESULTS: Twenty-one people living with dementia and 20 family members/care partners were interviewed. Four main themes were derived for helpful responses, and three main themes for unhelpful responses. Helpful responses included providing clear professional support pathways and supportive environments where people living with dementia can engage in physical, cognitive, social, and spiritual activities. Unhelpful responses included discriminatory treatment from others and use of medicalized terminology. Views toward terminology varied; people with lived experience most favored using "changed behaviors" over other terminology. Areas for improvement included targeting dementia stigma, societal education on dementia, and building confidence in people living with dementia by focusing on living well with dementia. CONCLUSION: Knowledge of the views of people living with dementia may assist healthcare professionals to provide more appropriate care for people living with dementia.

Measurement Properties of Smartphone Approaches to Assess Physical Activity in Healthy Young People: Systematic Review.

BACKGROUND: Physical inactivity is a preventable risk factor for several chronic diseases and one of the driving forces behind the growing global burden of disease. Recent evidence has shown that interventions using mobile smartphone apps can promote a significant increase in physical activity (PA) levels. However, the accuracy and reliability of using apps is unknown. OBJECTIVE: The aim of our review was to determine the accuracy and reliability of using mobile apps to measure PA levels in young people. We conducted a systematic review guided by PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses). METHODS: Studies published from 2007 to 2020 were sourced from 8 databases-Ovid MEDLINE, Embase (Elsevier), Cochrane Library (Wiley), PsychINFO (EBSCOhost), CINAHL (EBSCOhost), Web of Science (Clarivate), SPORTDiscus (EBSCOhost), and IEEE Xplore Digital Library database. Studies were conducted in young people aged 10-24 years and without chronic illnesses, who evaluated a mobile app's ability to measure PA. Primary outcomes included validity, reliability, and responsiveness of the measurement approach. Duplicate screening was conducted for eligibility, data extraction, and assessing the risk of bias. Results were reported as a systematic review. The main physical activity measures evaluated for each study were the following: total PA time (min/day or min/week), total moderate to vigorous PA per week, daily step count, intensity measure (heart rate), and frequency measure (days per week). RESULTS: Of the 149 identified studies, 5 met the inclusion criteria (322 participants, 176 female; mean age 14, SD 3 years). A total of 3 studies measured criterion validity and compared PA measured via apps against PA measured via an Actigraph accelerometer. The 2 studies that reported on construct validity identified a significant difference between self-reported PA and the objective measure. Only 1 of the 5 apps examined was available to the public, and although this app was highly accepted by young people, the app recorded PA to be significantly different to participants' self-reported PA. CONCLUSIONS: Overall, few studies assess the reliability, validity, and responsiveness of mobile apps to measure PA in healthy young people, with studies typically only reporting on one measurement property. Of the 3 studies that measured validity, all concluded that mobile phones were acceptable and valid tools. More research is needed into the validity and reliability of smartphone apps to measure PA levels in this population as well as in populations with other characteristics, including other age groups and those with chronic diseases. TRIAL REGISTRATION: PROSPERO CRD42019122242; https://www.crd.york.ac.uk/prospero/display_record.php?RecordID=122242.

Nonpharmacological approaches reduce symptoms of depression in dementia: A systematic review and meta-analysis.

BACKGROUND: Depression is a common psychological symptom associated with dementia. Pharmacological approaches are often used despite two large negative trials of efficacy. This meta-analysis examines nonpharmacological (i.e., psychosocial) approaches for symptoms of depression in people living with dementia and reports statistical and clinical significance. METHODS: Relevant studies published between 2012 and 2020 were sourced by searching electronic databases: MEDLINE, EMBASE, PsychINFO, Social Work Abstracts and the Cochrane Central Register of Controlled Trials. Studies were assessed for methodological quality. Random-effects meta-analysis was performed to calculate a pooled effect size (ES) and 95% confidence intervals (CI). RESULTS: Overall, 37 nonpharmacological studies were identified including 2,636 participants. The mean quality rating was high (12/14, SD=1.4). Meta-analysis revealed that nonpharmacological approaches were significantly associated with reduced symptoms of depression with a medium effect size (ES=-0.53, 95%CI [-0.72, -0.33], p < 0.0001). There was considerable heterogeneity between studies. Meta-regression revealed this was not driven by intervention type or setting (residential versus community). CONCLUSIONS: Nonpharmacological approaches such as reminiscence, cognitive stimulation/ rehabilitation, therapeutic, music-based approaches and education/ training, have the potential to reduce symptoms of depression in dementia.

Pharmacological and nonpharmacological approaches to reduce disinhibited behaviors in dementia: a systematic review.

OBJECTIVES: Disinhibited behaviors in dementia are associated with multiple negative outcomes. However, effective interventions are under-researched. This systematic review aims to provide an overview of intervention studies that report outcome measures of disinhibited behaviors in dementia. DESIGN: Systematic searches of the databases MEDLINE, EMBASE, and PsychINFO, Social Work Abstracts and Cochrane Central Register of Controlled Trial databases were conducted for publications published between 2002 and March 2020. We included hand-searched reviews, original articles, case reports, cohort studies, and randomized controlled trials (RCTs). All studies were rated for research quality. Statistical and clinical significance were considered for individual studies. Effect sizes were included where provided or calculated where possible. Mean effect sizes were calculated for RCTs only. PARTICIPANTS: The systematic review included studies involving people living with dementia. MEASUREMENTS: The Neuropsychiatric Inventory disinhibition subscale was used most often. RESULTS: Nine pharmacological and 21 nonpharmacological intervention studies utilized different theoretical/clinical approaches. These included pain management, antidepressants, models of care, education and/or training, music-based approaches, and physical activity. The quality of research in RCTs was strong with a greater effect size in nonpharmacological compared to pharmacological approaches (mean Cohen's d = 0.49 and 0.27, respectively). Disinhibition was a secondary outcome in all studies. CONCLUSION: Pharmacological (including pain management and antidepressants) and, more so, nonpharmacological (models of care, education/training, physical activity, and music) approaches were effective in reducing disinhibition.

Reconceptualising Behavioral and Psychological Symptoms of Dementia: Views of People Living With Dementia and Families/Care Partners.

Background: Behavioral and psychological symptoms of dementia (BPSD, also known as neuropsychiatric symptoms (NPS), changed behaviors and responsive behaviors), occur in up to 90 percent of people living with dementia (PLWD). These symptoms and behaviors strongly correlate with functional and cognitive impairment and contribute to ~30% of overall dementia costs. As decisions regarding care and strategies for BPSD are generally based on professional frames of reference, this study investigates whether the perspectives of PLWD and families/care partner on BPSD terminology can inform a more nuanced conceptualization of BPSD. Methods: PLWD and families/care partners participated in one-on-one semi-structured interviews. A thematic iterative approach was used to code the data and identify common themes until theoretical saturation was reached. Themes were compared between groups. Data were analyzed deductively in relation to pre-existing terminology regarding BPSD, and inductively to discover new ideas on use of such terminology as perceived by PLWD and others. Results: Forty-one volunteers were interviewed: 21 PLWD, mean age 71 yrs, mean Mini-Mental State Examination score 25, and 20 family members/care partners. Three main themes emerged from the data: (1) descriptions of BPSD from people with lived experience compared to clinical terms, (2) viewpoints on interpreting causes, and (3) experiences of concurrent BPSD. The experiences described and terms used by PLWD and families/care partners differed from terms used in existing professional frameworks (e.g., "disinhibition" described as 'loss of filter') and there were differences between PLWD and family members' interpretations of BPSD causes. Discussion/Conclusion: Reports from PLWD and families/carers describing their experiences of BPSD suggest a reconceptualization of BPSD terminology is needed to understand and de-stigmatize these symptoms and behaviors. For example, the term "agitated/hard to handle" would benefit by clearer, contextualized description, such as "frustrated with cognitive decline, discriminatory behavior and inadequate support systems." In better understanding individual expressions of BPSD, families, professionals and societies will be able to respond in ways that are helpful for PLWD. An informed, integrated understanding of BPSD and improved terminology use will have the potential to improve the quality of care and support for PLWD.

Measuring resting cerebral haemodynamics using MRI arterial spin labelling and transcranial Doppler ultrasound: Comparison in younger and older adults.

INTRODUCTION: Resting cerebral blood flow (CBF) and perfusion measures have been used to determine brain health. Studies showing variation in resting CBF with age and fitness level using different imaging approaches have produced mixed findings. We assess the degree to which resting CBF measures through transcranial Doppler (TCD) and arterial spin labeling (ASL) MRI provide complementary information in older and younger, fit and unfit cohorts. METHODS: Thirty-five healthy volunteers (20 younger: 24 ± 7y; 15 older: 66 ± 7y) completed two experimental sessions (TCD/MRI). Aging and fitness effects within and between imaging modalities were assessed. RESULTS: Middle cerebral artery blood velocity (MCAv, TCD) was lower and transit time (MRI) slower in older compared with younger participants (p < .05). The younger group had higher gray matter cerebral perfusion (MRI) than the older group, albeit not significantly (p = .13). Surprisingly, fitness effects in the younger group (decrease/increase in MCAv/transit time with fitness, respectively) opposed the older group (increase/decrease in MCAv/transit time). Whole cohort transit times correlated with MCAv (r=-0.63; p < .05), whereas tissue perfusion did not correlate with TCD measures. CONCLUSION: TCD and MRI modalities provide complementary resting CBF measures, with similar effects across the whole cohort and between subgroups (age/fitness) if metrics are comparable (e.g., velocity [TCD] versus transit time [MRI]).

Contrasting Measures of Cerebrovascular Reactivity Between MRI and Doppler: A Cross-Sectional Study of Younger and Older Healthy Individuals.

Cerebrovascular reactivity (CVR) is used as an outcome measure of brain health. Traditionally, lower CVR is associated with ageing, poor fitness and brain-related conditions (e.g. stroke, dementia). Indeed, CVR is suggested as a biomarker for disease risk. However, recent findings report conflicting associations between ageing or fitness and CVR measures. Inconsistent findings may relate to different neuroimaging modalities used, which include transcranial Doppler (TCD) and blood-oxygen-level-dependant (BOLD) contrast magnetic resonance imaging (MRI). We assessed the relationship between CVR metrics derived from two common imaging modalities, TCD and BOLD MRI, within the same individuals and with expected significant differences (i.e., younger vs. older) to maximise the expected spread in measures. We conducted two serial studies using TCD- and MRI-derived measures of CVR (via inspired 5% CO2 in air). Study 1 compared 20 younger (24 ± 7 years) with 15 older (66 ± 7 years) participants, Study 2 compared 10 younger (22 ± 2 years) with 10 older (72 ± 4 years) participants. Combining the main measures across studies, no significant correlation (r = 0.15, p = 0.36) was observed between individual participant TCD- and BOLD-CVR measures. Further, these measures showed differential effects between age groups; with TCD-CVR higher in the older compared to younger group (4 ± 1 vs. 3 ± 1 %MCAv/mmHg P ET CO2; p < 0.05, Hedges' g = 0.75), whereas BOLD-CVR showed no difference (p = 0.104, Hedges' g = 0.38). In Study 2 additional measures were obtained to understand the origin of the discrepancy: phase contrast angiography (PCA) MRI of the middle cerebral artery, showed a significantly lower blood flow (but not velocity) CVR response in older compared with younger participants (p > 0.05, Hedges' g = 1.08). The PCA CVR metrics did not significantly correlate with the BOLD- or TCD-CVR measures. The differing CVR observations between imaging modalities were despite expected, correlated (r = 0.62-0.82), age-related differences in resting CBF measures across modalities. Taken together, findings across both studies show no clear relationship between TCD- and BOLD-CVR measures. We hypothesize that CVR differences between imaging modalities are in part due to the aspects of the vascular tree that are assessed (TCD:arteries; BOLD:venules/veins). Further work is needed to understand the between-modality CVR response differences, but caution is needed when comparing CVR metrics derived from different imaging modalities.

Dietary flavanols improve cerebral cortical oxygenation and cognition in healthy adults.

Cocoa flavanols protect humans against vascular disease, as evidenced by improvements in peripheral endothelial function, likely through nitric oxide signalling. Emerging evidence also suggests that flavanol-rich diets protect against cognitive aging, but mechanisms remain elusive. In a randomized double-blind within-subject acute study in healthy young adults, we link these two lines of research by showing, for the first time, that flavanol intake leads to faster and greater brain oxygenation responses to hypercapnia, as well as higher performance only when cognitive demand is high. Individual difference analyses further show that participants who benefit from flavanols intake during hypercapnia are also those who do so in the cognitive challenge. These data support the hypothesis that similar vascular mechanisms underlie both the peripheral and cerebral effects of flavanols. They further show the importance of studies combining physiological and graded cognitive challenges in young adults to investigate the actions of dietary flavanols on brain function.

Exercise-induced elevations in cerebral blood velocity are greater in running compared to cycling at higher intensities.

The optimal exercise intensity and modality for maximizing cerebral blood flow (CBF) and hence potential exposure to positive, hemodynamically derived cerebral adaptations is yet to be fully determined. This study compared CBF velocity responses between running and cycling across a range of exercise intensities. Twenty-six participants (12 females; age: 26 ± 8 years) completed four exercise sessions; two mode-specific maximal oxygen consumption (VO2max ) tests, followed by (order randomized) two incremental exercise protocols (3-min stages at 35%, 50%, 65%, 80%, 95% VO2max ). Continuous measures of middle cerebral artery velocity (MCAv), oxygen consumption, end-tidal CO2 (PET CO2 ), and heart rate were obtained. Modality-specific MCAv changes were observed for the whole group (interaction effect: p = .01). Exercise-induced increases in MCAvmean during cycling followed an inverted-U pattern, peaking at 65% VO2max (Δ12 ± 7 cm/s from rest), whereas MCAvmean during running increased linearly up to 95% VO2max (change from rest: Δ12 ± 13 vs. Δ7 ± 8 cm/s for running vs. cycling at 95% VO2max ; p = .01). In contrast, both modalities had an inverted-U pattern for PET CO2 changes, although peaked at different intensities (running: 50% VO2max , Δ6 ± 2 mmHg; cycling: 65% VO2max , Δ7 ± 2 mmHg; interaction effect: p = .01). Further subgroup analysis revealed that the running-specific linear MCAvmean response was fitness dependent (Fitness*modality*intensity interaction effect: p = .04). Above 65% VO2max , fitter participants (n = 16; male > 45 mL/min/kg and female > 40 mL/min/kg) increased MCAvmean up to 95% VO2max , whereas in unfit participants (n = 7, male < mL/min/kg and female < 35 mL/min/kg) MCAvmean returned toward resting values. Findings demonstrate that modality- and fitness-specific profiles for MCAvmean are seen at exercise intensities exceeding 65% VO2max .

The CO2 stimulus duration and steady-state time point used for data extraction alters the cerebrovascular reactivity outcome measure.

NEW FINDINGS: What is the central question of this study? Cerebrovascular reactivity (CVR) is a common functional test to assess brain health, and impaired CVR has been associated with all-cause cardiovascular mortality: does the duration of the CO2 stimulus and the time point used for data extraction alter the CVR outcome measure? What is the main finding and its importance? This study demonstrated CVR measures calculated from 1 and 2 min CO2 stimulus durations were significantly higher than CVR calculated from a 4 min CO2 stimulus. CVRs calculated from the first 2 min of the CO2 stimulus were significantly higher than CVR values calculated from the final minute if the duration was ≥4 min. This study highlights the need for consistent methodological approaches. ABSTRACT: Cerebrovascular reactivity to carbon dioxide (CVR) is a common functional test to assess brain vascular health, though conflicting age and fitness effects have been reported. Studies have used different CO2 stimulus durations to induce CVR and extracted data from different time points for analysis. Therefore, this study examined whether these differences alter CVR and explain conflicting findings. Eighteen healthy volunteers (24 ± 5 years) inhaled CO2 for four stimulus durations (1, 2, 4 and 5 min) of 5% CO2 (in air) via the open-circuit Douglas bag method, in a randomized order. CVR data were derived from transcranial Doppler (TCD) measures of middle cerebral artery blood velocity (MCAv), with concurrent ventilatory sensitivity to the CO2 stimulus ( V̇E,CO2 ). Repeated measures ANOVAs compared CVR and V̇E,CO2 measures between stimulus durations and steady-state time points. An effect of stimulus duration was observed (P = 0.002, η² = 0.140), with 1 min (P = 0.010) and 2 min (P < 0.001) differing from 4 min, and 2 min differing from 5 min (P = 0.019) durations. V̇E,CO2 sensitivity increased ∼3-fold from 1 min to 4 and 5 min durations (P < 0.001, η² = 0.485). CVRs calculated from different steady-state time points within each stimulus duration were different (P < 0.001, η² = 0.454), specifically for 4 min (P = 0.001) and 5 min (P < 0.001), but not 2 min stimulus durations (P = 0.273). These findings demonstrate that methodological differences alter the CVR measure.

Nicotinamide Riboside Augments the Aged Human Skeletal Muscle NAD+ Metabolome and Induces Transcriptomic and Anti-inflammatory Signatures.

Nicotinamide adenine dinucleotide (NAD+) is modulated by conditions of metabolic stress and has been reported to decline with aging in preclinical models, but human data are sparse. Nicotinamide riboside (NR) supplementation ameliorates metabolic dysfunction in rodents. We aimed to establish whether oral NR supplementation in aged participants can increase the skeletal muscle NAD+ metabolome and if it can alter muscle mitochondrial bioenergetics. We supplemented 12 aged men with 1 g NR per day for 21 days in a placebo-controlled, randomized, double-blind, crossover trial. Targeted metabolomics showed that NR elevated the muscle NAD+ metabolome, evident by increased nicotinic acid adenine dinucleotide and nicotinamide clearance products. Muscle RNA sequencing revealed NR-mediated downregulation of energy metabolism and mitochondria pathways, without altering mitochondrial bioenergetics. NR also depressed levels of circulating inflammatory cytokines. Our data establish that oral NR is available to aged human muscle and identify anti-inflammatory effects of NR.

Brain train to combat brain drain; focus on exercise strategies that optimize neuroprotection.

What is the topic of this review? The topic of this review is to consider innovative exercise strategies that optimize neuroprotection in order to combat cognitive decline and neurodegenerative disease in older age. What advances does it highlight? The review summarizes current understanding around exercise mode, duration, frequency and intensity, and then highlights adaptive roles of select stressors that have equal if not indeed greater capacity than exercise per se to induce health-related adaptation in the brain. These stressors include, but are not exclusively limited to, hydrostatic and thermal stress, hypoxia, nutritional supplementation and cognitive loading, and are effective by targeting specific pathways that collectively contribute towards improved brain structure and function. The prevalence of cognitive decline and neurodegenerative diseases (e.g. stroke and dementia) is increasing. Numerous studies show that regular exercise has beneficial effects on brain health in clinical and non-clinical populations, yet adherence to public health exercise guidelines is notoriously poor. Recently, novel exercise strategies have been investigated to allow for more individualized and prescriptive approaches that target the key mechanistic pathways that allow exercise to mediate adaptation. This work exploring alternative approaches to the traditional model of exercise training has demonstrated exciting potential for positive health-related adaptations (especially for metabolic, muscle and cardiovascular function). However, few studies to date have focused on brain adaptations. The aim of this review is to summarize new and innovative interventions that have the potential to optimize exercise for improved brain health (i.e. brain structure and function). First, we briefly summarize current understanding of the nature whereby positive effects of exercise deliver their influence on the brain (i.e. underlying mechanisms and factors affecting its delivery). Second, we introduce the effects of exercise training on cognition and give examples of studies showing the beneficial effects of exercise in clinical populations. Finally, we explore the adaptive roles of individual stressors that may induce greater health-related adaptations in the brain than exercise alone, including environmental stressors (hydrostatic stress, thermal stress and hypoxia), nutritional supplementation and cognitive loading. In summary, optimized interventions that target key mechanistic pathways linked to improved brain structure and function could ultimately protect against and/or ameliorate cognitive decline and neurodegenerative diseases.