Eliza Toth

57204073979

Publications - 5

Relationship between primitive reflexes, functional fitness, handgrip strength, and physical activity in older adults aged 65 and over

Publication Name: Physiological Reports

Publication Date: 2025-04-01

Volume: 13

Issue: 7

Page Range: Unknown

Description:

The reemergence of primitive reflexes (PRs) in older adults is associated with dementia and cognitive impairment. Recent experimental work suggests gentle sensorimotor exercises may halt or reverse PR's inverse development. These findings question whether physical activity (PA) is negatively related to PRs. This study aimed to test this relationship in 52 older adults aged 66 and over who were volunteers from seven Hungarian nursing homes. They were tested individually using the Senior Test, hand-grip strength, 13 PRs, and PA levels using the Global Physical Activity Questionnaire. Apart from upper and lower body flexibility, all functional fitness indices and PA were negatively related to the number of PRs. A bootstrapped multiple hierarchical linear regression revealed that only PA was a statistically significant predictor (p < 0.001) of the PRs, accounting for 41% of the variance. This study is the first to demonstrate a robust negative relationship between PA and PRs and a weak negative association with hand-grip strength and four elements of functionality in older adults. The implications of the results could be significant for developing interventions to prevent or delay PRs' inverse development, which is associated with adverse mental health in older adults.

Open Access: Yes

DOI: 10.14814/phy2.70229

Changes in primitive reflexes in older adults and their relationship to mental health indices: An experimental investigation

Publication Name: Experimental Gerontology

Publication Date: 2024-10-15

Volume: 196

Issue: Unknown

Page Range: Unknown

Description:

The reemergence of primitive reflexes (PRs) in older age is related to cognitive impairment. Currently, there are no means to prevent or slow their reappearance, but research evidence exists for their control in children. Therefore, this experiment investigated whether a 16-week special sensorimotor exercise program could benefit older adults and whether the intervention-induced changes (if any) may be associated with various indices of mental health. Of 115 adults over 60, 95 completed the study (mean age = 76.37 ± SD = 7.04 years, 22 % men). The experimental group (n = 38) showed an almost threefold decline in PRs compared to controls. In contrast, the control group (n = 57) exhibited a nearly threefold increase in PRs compared to the intervention group. Cognitive function increased in the experimental but not in the control group. Changes in PRs over the 16-week intervention were positively related to negative mental health indices (hopelessness and perceived stress) and negatively related to well-being. These findings suggest that the here-presented mild sensorimotor exercises could affect older adults' reemerging PRs and that changes in PRs are associated with mental health benefits. These results may open new research avenues toward preventing cognitive and psychological decline in older adults.

Open Access: Yes

DOI: 10.1016/j.exger.2024.112583

Quantifying the relationship between physical performance and mental wellbeing in older adults: a field study

Publication Name: Frontiers in Aging

Publication Date: 2025-01-01

Volume: 6

Issue: Unknown

Page Range: Unknown

Description:

Introduction: Although the relationship between functionality, as reflected in physical performance (PHP), and mental health in older adults has been researched, its strength remains unclear. Methods: This field study aimed to determine the strength of this relationship in adults aged 60 and above using seven PHP indices and six psychological measures. We individually tested 114 older adults. Objective measures included six PHP indices consisting of the Senior Test and handgrip strength. Subjective measures included resilience, wellbeing, happiness, perceived stress, hopelessness, and life satisfaction. Results: Structural equation modeling (SEM) revealed two latent constructs: PHP and mental wellbeing (MWB): robust fit (MLR): X2 (75) = 136.28, p < 0.001; CFI = 0.967; TLI = 0.960; RMSEA = 0.066 (90% CI [0.000, 0.128]); SRMR = 0.088. The latent partial correlation between PHP and MWB (adjusted for Age) was φ = 0.46, indicating ∼21% shared variance. The correlation between the two latent factors was moderate (r = 0.46), suggesting that other unassessed factors might account for the relationship. Discussion: Based on objective PHP and subjective MWB measures, these results suggest a modest connection, with the two latent constructs sharing ∼1/5 of their variances. Consequently, further research is needed to identify other factors affecting the studied relationship in older adults. These cross-sectional findings, suggesting a moderate association, should be interpreted with caution. Still, they support recommending physical activity as one component of broader, multi-domain strategies to support the wellbeing of older adults.

Open Access: Yes

DOI: 10.3389/fragi.2025.1630343

Primitive reflexes as behavioral biomarkers of cognitive aging: associations with physical activity and resilience—a pilot study

Publication Name: Frontiers in Aging Neuroscience

Publication Date: 2025-01-01

Volume: 17

Issue: Unknown

Page Range: Unknown

Description:

Introduction: Primitive reflexes (PRs) are brainstem-mediated automatic responses that typically disappear in early life, but may reappear in older age, which may be associated with neurodegenerative processes. But the presence of PRs in cognitively healthy adults has not yet been sufficiently explored. The relationship between PRs and cognitive functioning (COG) may be influenced by modifiable factors such as physical activity (PA) and psychological resilience. This cross-sectional observational pilot study aimed to investigate the mediating and moderating role of physical activity and resilience in the association between primitive reflexes and cognitive functioning in older adults. Methods: A total of 30 older adults (mean age 73.4 ± 6.9 years; 80% female) living in residential care facilities were assessed. PRs were evaluated using standardized neurological protocols, COG was measured with the Mini-Mental State Examination, PA with the Global Physical Activity Questionnaire, and resilience with the Connor–Davidson Resilience Scale. Moderation and mediation models were tested using Hayes’ PROCESS macro, controlling for age and BMI. Results: A higher number of primitive reflexes was strongly associated with lower cognitive functioning [COG (r = −0.904, p < 0.001)]. Physical activity showed a significant mediating effect in this association, indicating that more active older adults exhibited better cognitive performance despite the presence of primitive reflexes. Resilience, although correlated with both cognition and physical activity, did not show a mediating or moderating effect. Discussion: These findings highlight primitive reflexes as potential behavioral biomarkers of cognitive aging, and underscore the importance of physical activity as a protective factor that may buffer against neurocognitive decline.

Open Access: Yes

DOI: 10.3389/fnagi.2025.1687512

Psychometric validity and reliability of the Turkish exercise addiction inventory-3

Publication Name: Addicta the Turkish Journal on Addictions

Publication Date: 2026-03-13

Volume: 13

Issue: 1

Page Range: 137-146

Description:

The Exercise Addiction Inventory-3 is the latest version of the Exercise Addiction Inventory, whose use has become more frequent in several countries. The present study investigated its psychometric properties among Turkish adults. The study recruited 389 participants through online social media platforms. Reliability was tested through Cronbach’s alpha and McDonald’s omega. Validity was tested through correlations among the Exercise Addiction Inventory-3 score and scores on the Exercise Dependence Scale-Revised, Ten-Item Personality Inventory, SCOFF Questionnaire, and Obsessive-Compulsive Inventory-Revised. Structural validity was tested via confirmatory factor analysis and measurement invariance. The findings suggested that the Turkish version of the Exercise Addiction Inventory-3 is reliable. Moreover, confirmatory factor analysis indicated that the models demonstrated good to excellent fit indices. Partial measurement invariance was observed. The Exercise Addiction Inventory-3 scores were positively correlated with the Exercise Dependence Scale-Revised and Obsessive-Compulsive Inventory-Revised scores. The total scale score and the Addiction Tendency subscale score were negatively correlated with SCOFF scores but not the Health Relevance subscale scores. The Turkish Exercise Addiction Inventory-3 is a reliable and valid instrument to assess the risk of exercise addiction that differentiates at-risk groups from passionate exercisers. Implications for future studies are discussed.

Open Access: Yes

DOI: 10.15805/addicta.2025.24284