Effects of a 12-Week Periodized Resistance Training Program on Resting Brain Activity and Cerebrovascular Function: A Nonrandomized Pilot Trial

Cognitive gains and cortical thickness changes after 12 weeks of resistance training in older adults with low and high risk of mild cognitive impairment: Findings from a randomized controlled trial

BACKGROUND

In this randomized controlled trial, we assessed the neuroprotective effect of a 12-week resistance training (RT) program on executive control and cortical thickness of the prefrontal, temporal, parietal, and central cortex, regions prone to structural decline in individuals with mild cognitive impairment (MCI).

METHODS

Seventy older adults (aged 60-85 y old, 38 females and 32 males) were randomly allocated to a 12-week lower limb RT program or a waiting list control group. The Montreal Cognitive Assessment (MoCA) was used to stratify participants screened for high (< 26) or low (≥ 26) MCI risk. Cognitive measurements consisted of the two-choice reaction time, Go/No-go, mathematical processing, and memory search tests. Cortical thickness was estimated from 3D T1-weighted MR images.

RESULTS

Complete randomized controlled trial data was obtained from 50 individuals (24 with high MCI risk). Significant Group x Time interactions were found for response on the Go/No-go task and cortical thickness of the right parahippocampal gyrus [F ≥ 5.3, p ≤ 0.03; η2p ≥ 0.12]. An inspection of these observations revealed an increase in cortical thickness (+1.18 %) and a decrease in response time (-4.35 %) in individuals with high MCI risk allocated to the exercise group (both uncorrected p = 0.08). Decreased response time on the Go/No-go task was associated with increased cortical thickness in the right entorhinal gyrus (uncorrected p = 0.01).

CONCLUSIONS

Our study demonstrated that 12 weeks of RT intervention may effectively improve cognitive performance and slow neuronal loss in the hippocampal complex of older adults at high MCI risk. Findings support evidence for the neuroprotective effects of resistance training and its potential role in cognitive health.

Effectiveness of Distant/Remote Blessing Treatment on Cognitive-motor Function: A Randomized Double-blind Placebo-controlled Trial

Background

Biofield therapies can be administered in person (hands-on treatment) or remotely, and this study focuses on the latter. A literature review did not find any reports on the effectiveness of remote biofield energy /blessing therapy in enhancing cognition and motor function performance in adults.

Objective

The aim of this study was to examine the effect of distant/remote blessing (biofield energy) therapy on the cognitive and motor functions in adults with self-reported neuropsychological impairments using NIH Toolbox®.

Methods

The present study was a randomized, double-blind clinical trial involving 117 participants with self-reported neuropsychological impairments. These participants were stratified into three distinct groups: control, sham control, and blessing/biofield treatment as the intervention. At baseline (day 0), day 90, and day 180, NIH Toolbox® was employed to evaluate all participants' cognitive and motor function scores.

Results

In the blessing treatment group, language function score (p <0.01), working memory (p <0.0001), and episodic memory (p <0.0001) scores exhibited statistically significant differences compared to both the naïve control and sham control groups. Moreover, in the blessing intervention group, a substantial improvement was observed in locomotion (p <0.0001), standing balance (p <0.01), dexterity (p <0.01), grip strength (p <0.05), and muscle endurance (p <0.05) compared to the naïve control and sham control groups. Importantly, no adverse effects were reported during the study period.

Conclusion

The study outcomes revealed that distant/remote blessing/biofield energy therapy is safe, non-invasive, and less expensive. It enhances cognitive-motor functions in adults with perceived neuropsychological impairments.

Clinical Trial Registration

CTRI/2022/07/043736.

Effects of Resistance Training on Executive Functions of Cognitively Healthy Older Adults: A Systematic Review and Meta-Analysis Protocol

Background/Objectives: Aging involves a series of changes in non-pathological age-related conditions, some of which impact the cognitive functioning of older adults. Executive functions are cognitive skills that are often affected in this process, although they have been shown to improve after physical exercise interventions. This protocol aims to describe the procedures that will be carried out in a systematic literature review, including a meta-analysis of the effects of resistance interventions on the main dimensions of executive function in cognitively healthy older adults compared to active or passive control groups. Methods: The PRISMA-P guidelines will be followed. Eligibility criteria will be organized based on the PICOS strategy (older adults with normal cognition ≥60 years; chronic resistance interventions ≥4 weeks; active or passive control group; direct measures of executive function). The PubMed, EBSCO, Scopus, and Web of Science databases will be used. The risk of bias and quality of evidence will be measured using RoB2 and GRADE, respectively. The DerSimonian-Laird random effects model will be used for the meta-analysis. The effect size will be calculated using Hedges' g with a 95% confidence interval and p < 0.05 to indicate statistical significance. Discussion: The results of the proposed review may be useful to justify the design and implementation of treatment plans based on resistance training for the prevention and management of cognitive changes typical of aging among older adults. PROSPERO registry: CRD42024571127.

Cerebrovascular adaptations to habitual resistance exercise with aging

Resistance training (RT) is associated with improved metabolism, bone density, muscular strength, and lower risk of osteoporosis, sarcopenia, and cardiovascular disease. Although RT imparts many physiological benefits, cerebrovascular adaptations to chronic RT are not well defined. Participation in RT is associated with greater resting peripheral arterial diameters, improved endothelial function, and general cardiovascular health, whereas simultaneously linked to reductions in central arterial compliance. Rapid blood pressure fluctuations during resistance exercise, combined with reduced arterial compliance, could lead to cerebral microvasculature damage and subsequent cerebral hypoperfusion. Reductions in cerebral blood flow (CBF) accompany normal aging, where chronic reductions in CBF are associated with changes in brain structure and function, and increased risk of neurodegeneration. It remains unclear whether reductions in arterial compliance with RT relate to subclinical cerebrovascular pathology, or if such adaptations require interpretation in the context of RT specifically. The purpose of this narrative review is to synthesize literature pertaining to cerebrovascular adaptations to RT at different stages of the life span. This review also aims to identify gaps in the current understanding of the long-term impacts of RT on cerebral hemodynamics and provide a mechanistic rationale for these adaptations as they relate to aging, cerebral vasculature, and overall brain health.