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Zhang Y, Zhu R, Ge L, Zhang X, Tian D, Pan F, Wang M, Cai G. Association of handgrip strength asymmetry and weakness with cognitive function: a nationally representative cohort study. Maturitas 2024; 187:108057. [PMID: 38908060 DOI: 10.1016/j.maturitas.2024.108057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 05/14/2024] [Accepted: 06/17/2024] [Indexed: 06/24/2024]
Abstract
OBJECTIVE To describe the association of handgrip strength asymmetry and weakness with cognitive function among Chinese middle-aged and older adults. STUDY DESIGN We used data from four waves (2011, 2013, 2015, and 2018) of the China Health and Retirement Longitudinal Study. Handgrip strength was measured at baseline. Handgrip strength asymmetry was defined on the basis of the ratio of handgrip strength of the non-dominant hand to that of the dominant hand (i.e. non-dominant/dominant): a ratio of <0.9 defined as dominant handgrip strength asymmetry and >1.1 as non-dominant handgrip strength asymmetry. Weakness was defined as a handgrip strength of <28 kg for males or <18 kg for females. MAIN OUTCOME MEASURES Cognitive function with its two core dimensions (episodic memory and mental status) at each wave was assessed and standardized. RESULTS 9333 participants (48.3 % female, age 58.2 ± 9.0 years) were included. Non-dominant but not dominant handgrip strength asymmetry was significantly associated with poorer cognitive function at baseline (β = -0.121, -0.092, and -0.132 for mental status, episodic memory, and global cognition, respectively). In longitudinal analyses over 2 years, dominant handgrip strength asymmetry significantly slowed cognitive decline (β = -0.078 and -0.069 for mental status and global cognition, respectively), and non-dominant handgrip strength asymmetry accelerated cognitive decline (β = 0.053 and 0.043 for episodic memory and global cognition, respectively). Weakness was associated with poorer cognitive function at baseline and cognitive decline over 2, 4, and 7 years (all P < 0.05). CONCLUSIONS In middle-aged and older adults, non-dominant handgrip strength asymmetry and weakness were associated with poorer cognitive function and predicted accelerated cognitive decline. Dominant handgrip strength asymmetry may be beneficial for maintaining cognitive function.
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Affiliation(s)
- Youyou Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, China
| | - Rui Zhu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, China
| | - Liru Ge
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, China
| | - Xiaoyue Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, China
| | - Dalong Tian
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, China
| | - Faming Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, China; Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Hefei 230032, Anhui, China
| | - Mengmeng Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, China.
| | - Guoqi Cai
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, China; Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia.
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Tian Q, Lee PR, Yang Q, Moore AZ, Landman BA, Resnick SM, Ferrucci L. The mediation roles of intermuscular fat and inflammation in muscle mitochondrial associations with cognition and mobility. J Cachexia Sarcopenia Muscle 2024; 15:138-148. [PMID: 38116708 PMCID: PMC10834332 DOI: 10.1002/jcsm.13413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/24/2023] [Accepted: 11/20/2023] [Indexed: 12/21/2023] Open
Abstract
BACKGROUND Mitochondrial dysfunction may contribute to brain and muscle health through inflammation or fat infiltration in the muscle, both of which are associated with cognitive function and mobility. We aimed to examine the association between skeletal muscle mitochondrial function and cognitive and mobility outcomes and tested the mediation effect of inflammation or fat infiltration. METHODS We analysed data from 596 Baltimore Longitudinal Study of Aging participants who had concurrent data on skeletal muscle oxidative capacity and cognitive and mobility measures of interest (mean age: 66.1, 55% women, 24% Black). Skeletal muscle oxidative capacity was assessed as post-exercise recovery rate (kPCr) via P31 MR spectroscopy. Fat infiltration was measured as intermuscular fat (IMF) via CT scan and was available for 541 participants. Inflammation markers [IL-6, C-reactive protein (CRP), total white blood cell (WBC), neutrophil count, erythrocyte sedimentation rate (ESR), or albumin] were available in 594 participants. We examined the association of kPCr and cognitive and mobility measures using linear regression and tested the mediation effect of IMF or inflammation using the mediation package in R. Models were adjusted for demographics and PCr depletion. RESULTS kPCr and IMF were both significantly associated with specific cognitive domains (DSST, TMA-A, and pegboard dominant hand performance) and mobility (usual gait speed, HABCPPB, 400 m walk time) (all P < 0.05). IMF significantly mediated the relationship between kPCr and these cognitive and mobility measures (all P < 0.05, proportion mediated 13.1% to 27%). Total WBC, neutrophil count, and ESR, but not IL-6 or CRP, also mediated at least one of the cognitive and mobility outcomes (all P < 0.05, proportion mediated 9.4% to 15.3%). CONCLUSIONS Skeletal muscle mitochondrial function is associated with cognitive performance involving psychomotor speed. Muscle fat infiltration and specific inflammation markers mediate the relationship between muscle mitochondrial function and cognitive and mobility outcomes. Future studies are needed to confirm these associations longitudinally and to understand their mechanistic underpinnings.
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Affiliation(s)
- Qu Tian
- Longitudinal Studies Section, Translational Gerontology Branch, National Institute on Aging, Baltimore, MD, USA
| | - Philip R Lee
- Longitudinal Studies Section, Translational Gerontology Branch, National Institute on Aging, Baltimore, MD, USA
| | - Qi Yang
- Department of Computer Science, Vanderbilt University, Nashville, TN, USA
| | - Anne Z Moore
- Longitudinal Studies Section, Translational Gerontology Branch, National Institute on Aging, Baltimore, MD, USA
| | - Bennett A Landman
- Department of Computer Science, Vanderbilt University, Nashville, TN, USA
- Department of Electrical and Computer Engineering, Vanderbilt University, Nashville, TN, USA
| | - Susan M Resnick
- Laboratory of Behavioral Neuroscience, National Institute on Aging, Baltimore, MD, USA
| | - Luigi Ferrucci
- Longitudinal Studies Section, Translational Gerontology Branch, National Institute on Aging, Baltimore, MD, USA
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Heyn PC, Tagawa A, Pan Z, Reistetter T, Ng TKS, Lewis M, Carollo JJ. The association between isometric strength and cognitive function in adults with cerebral palsy. Front Med (Lausanne) 2023; 10:1080022. [PMID: 37181370 PMCID: PMC10170265 DOI: 10.3389/fmed.2023.1080022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 04/03/2023] [Indexed: 05/16/2023] Open
Abstract
Background The literature supports quantifying the maximum force/tension generated by one's forearm muscles such as the hand grip strength (HGS) to screen for physical and cognitive frailty in older adults. Thus, we postulate that individuals with cerebral palsy (CP), who are at higher risk for premature aging, could benefit from tools that objectively measure muscle strength as a functional biomarker to detect frailty and cognitive decline. This study assesses the clinical relevancy of the former and quantifies isometric muscle strength to determine its association with cognitive function in adults with CP. Methods Ambulatory adults with CP were identified from a patient registry and were enrolled into this study. Peak rate of force development (RFD) and maximum voluntary isometric contraction of the quadriceps were measured using a commercial isokinetic machine, while HGS was collected with a clinical dynamometer. Dominant and non-dominant side were identified. Standardized cognitive assessments, including the Wechsler Memory and Adult Intelligence Scales IV, Short Test of Mental Status, and the Patient-Reported Outcomes Measurement Information System (PROMIS®) were used to evaluate cognitive function. Results A total of 57 participants (32 females; mean age 24.3 [SD 5.3]; GMFCS levels I-IV) were included in the analysis. Although dominant and non-dominant RFD and HGS measures were associated with cognitive function, non-dominant peak RFD showed the strongest associations with cognitive function. Conclusion RFD capacity may reflect age-related neural and physical health and could be a better health indicator than HGS in the CP population.
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Affiliation(s)
- Patricia C. Heyn
- Center for Optimal Aging (COA), Marymount University, Arlington, VA, United States
- Physical Medicine & Rehabilitation Department, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Alex Tagawa
- Center for Gait and Movement Analysis (CGMA), Children’s Hospital Colorado, Aurora, CO, United States
- Musculoskeletal Research Center (MRC), Orthopedics Institute, Children’s Hospital Colorado, Aurora, CO, United States
| | - Zhaoxing Pan
- Center for Gait and Movement Analysis (CGMA), Children’s Hospital Colorado, Aurora, CO, United States
- Musculoskeletal Research Center (MRC), Orthopedics Institute, Children’s Hospital Colorado, Aurora, CO, United States
| | - Timothy Reistetter
- University of Texas Health Science Center San Antonio, San Antonio, TX, United States
| | - Ted Kheng Siang Ng
- Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ, United States
| | - Meredith Lewis
- Center for Gait and Movement Analysis (CGMA), Children’s Hospital Colorado, Aurora, CO, United States
- Musculoskeletal Research Center (MRC), Orthopedics Institute, Children’s Hospital Colorado, Aurora, CO, United States
| | - James J. Carollo
- Physical Medicine & Rehabilitation Department, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
- Center for Gait and Movement Analysis (CGMA), Children’s Hospital Colorado, Aurora, CO, United States
- Musculoskeletal Research Center (MRC), Orthopedics Institute, Children’s Hospital Colorado, Aurora, CO, United States
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Lomborg SD, Dalgas U, Hvid LG. The importance of neuromuscular rate of force development for physical function in aging and common neurodegenerative disorders - a systematic review. JOURNAL OF MUSCULOSKELETAL & NEURONAL INTERACTIONS 2022; 22:562-586. [PMID: 36458393 PMCID: PMC9716292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 05/11/2022] [Indexed: 12/14/2022]
Abstract
We systematically reviewed existing literature regarding lower extremity neuromuscular rate of force development (RFD), maximal muscle strength (Fmax), and physical function in neurodegenerative populations, and to what extent these outcomes are affected and/or associated. Following PRISMA guidelines, 4 databases (Pubmed, Embase, SPORTDiscus, Web of Science) were searched. Across aging, Parkinson Disease (PD), Alzheimer's Disease (AD), Multiple Sclerosis (MS), or Stroke, included studies should report (Part 1) deficits in lower extremity RFD, Fmax, and physical function (~ individuals having inferior vs. superior physical function), and/or (Part 2) associations between RFD (or Fmax) and physical function. A total of N=32 studies (n=1087 participants) were included. Part 1: deficits in RFD (-31%, mean; N=22) were comparable to deficits in physical function (-26%; N=7), yet both deficits exceeded that of Fmax (-21%; N=20). Part 2: associations between RFD and physical function (r2=0.13, mean; N=16) were comparable to associations between Fmax and physical function ((r2=0.15; N=12). Lower extremity RFD is (1) particularly sensitive (i.e. adapts earlier and/or more extensively) towards neurodegeneration, and more so than Fmax, and (2) of importance for physical function but apparently not superior to Fmax. RFD could serve as a useful indicator/biomarker of changes in neuromuscular function elicited by neurodegeneration.
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Affiliation(s)
- Sidsel D. Lomborg
- Exercise Biology, Department of Public Health, Aarhus University, Denmark
| | - Ulrik Dalgas
- Exercise Biology, Department of Public Health, Aarhus University, Denmark
| | - Lars G. Hvid
- Exercise Biology, Department of Public Health, Aarhus University, Denmark
- The Danish MS Hospitals, Ry and Haslev, Denmark
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Braga P, Henrique J, Almeida S, Arida R, Gomes da Silva S. Factors affecting executive function performance of Brazilian elderly in the Stroop test. Braz J Med Biol Res 2022; 55:e11917. [PMID: 35588525 PMCID: PMC9054033 DOI: 10.1590/1414-431x2022e11917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 02/15/2022] [Indexed: 12/27/2022] Open
Abstract
Aging is related to a decrease in physiological abilities, especially cognitive
functions. To unravel further evidence of age-related cognitive decline, we
analyzed which physical and functional variables are predictors of cognitive
performance in a sample of 498 Brazilian elderly (67.26% women). To do so, we
used the Stroop test as a tool to evaluate executive functions and the General
functional fitness index (GFFI) to evaluate the functional fitness of the
participants. A linear regression analysis revealed that female sex (β=-0.097;
t=-2.286; P=0.023), younger age (β=0.205;
t=4.606; P<0.0001), more years of education (β=-0.280;
t=-6.358; P<0.0001), and higher GFFI (β=-0.101;
t=-2.347; P<0.02) were predictors of better cognitive
performance. Body mass index (kg/m2) and nutritional status
(underweight, eutrophic, overweight, or obese) were not predictors of cognitive
performance. Interestingly, among the GFFI tasks, muscle strength influenced the
test execution time, both in upper and lower limbs (elbow flexion: β=-0.201;
t=-4.672; P<0.0001; sit-to-stand: β=-0.125; t=-2.580; P<0.01). Our
findings showed that: 1) women performed the Stroop test faster than men; 2) the
older the person, the lower was the cognitive performance; 3) the higher the
education, the better the test execution time; and 4) higher scores in the GFFI
were associated with a better performance in the Stroop test. Therefore, gender,
age, education, and functional fitness and capacity were predictors of cognitive
performance in the elderly.
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Affiliation(s)
- P.L.G. Braga
- Universidade Federal de São Paulo, Brasil; Faculdade do Clube Náutico Mogiano, Brasil; Instituto Educatie de Ensino e Pesquisa, Brasil
| | | | - S.S. Almeida
- Hospital Israelita Albert Einstein, Brasil; Universidade Ibirapuera, Brasil
| | - R.M. Arida
- Universidade Federal de São Paulo, Brasil
| | - S. Gomes da Silva
- Universidade de Mogi das Cruzes, Brasil; Fundação Cristiano Varella, Brasil; Centro Universitário FAMINAS, Brasil
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Liu M, Liu S, Sun S, Tian H, Li S, Wu Y. Sex Differences in the Associations of Handgrip Strength and Asymmetry With Multimorbidity: Evidence From the English Longitudinal Study of Ageing. J Am Med Dir Assoc 2021; 23:493-498.e1. [PMID: 34389337 DOI: 10.1016/j.jamda.2021.07.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 07/08/2021] [Accepted: 07/11/2021] [Indexed: 12/16/2022]
Abstract
OBJECTIVES To determine the sex-specific associations of handgrip strength (HGS) and asymmetry with incident multimorbidity and examine whether these relationships differ by sex. DESIGN Prospective cohort study. SETTING AND PARTICIPANTS Secondary analyses of data from the English Longitudinal Study of Ageing (ELSA, waves 2-8). The analytic sample included 3977 participants (51.4% female) aged ≥50 years who had data for HGS on both hands and were living without multimorbidity at baseline. MEASURES HGS was assessed with a handheld dynamometer. Individuals in the lowest tertile of sex-specific age-adjusted HGS were defined as having low HGS. The largest HGS readings from the nondominant and dominant hand were used to calculate HGS ratio [nondominant HGS (kg)/dominant HGS (kg)]. Those with HGS ratio <0.90 or >1.10 had any HGS asymmetry. Further, those with HGS ratio <0.90 had dominant HGS asymmetry, whereas those with HGS ratio >1.10 had nondominant HGS asymmetry. Multimorbidity was defined as the coexistence of ≥2 chronic diseases. Cox proportional hazards regression models were conducted for analyses. RESULTS Low HGS was associated with multimorbidity among older men [hazard ratio (HR) 1.20, 95% confidence interval (CI) 1.03-1.40] and women (HR 1.19, 95% CI 1.03-1.38). No significant effect modification by sex was observed (P-interaction = .71). HGS asymmetry increased the risk of multimorbidity in women only (HR 1.23, 95% CI 1.07-1.41). The relationship between HGS asymmetry and multimorbidity risk differed by sex (P-interaction = .01). Similarly, both dominant HGS asymmetry (HR 1.21, 95% CI 1.05-1.40) and nondominant HGS asymmetry (HR 1.32, 95% CI 1.03-1.68) were related to incident multimorbidity in women only. There was a significant interaction between dominant HGS asymmetry and sex (P-interaction = .02). CONCLUSIONS AND IMPLICATIONS Examining HGS asymmetry in HGS test protocols can provide novel insights for the predictive power of HGS in the accumulation of diseases, particularly in women.
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Affiliation(s)
- Mengli Liu
- Department of Epidemiology and Health Statistics, Public Health College, Qingdao University, Qingdao, China
| | - Shuqin Liu
- Department of Emergency, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Shuqin Sun
- Department of Geriatrics, Affiliated Hospital of Qingdao University, Qingdao, China
| | - Huimin Tian
- Department of Epidemiology and Health Statistics, Public Health College, Qingdao University, Qingdao, China
| | - Suyun Li
- Department of Epidemiology and Health Statistics, Public Health College, Qingdao University, Qingdao, China
| | - Yili Wu
- Department of Epidemiology and Health Statistics, Public Health College, Qingdao University, Qingdao, China.
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Mohammadnejad A, Soerensen M, Baumbach J, Mengel‐From J, Li W, Lund J, Li S, Christiansen L, Christensen K, Hjelmborg JVB, Tan Q. Novel DNA methylation marker discovery by assumption-free genome-wide association analysis of cognitive function in twins. Aging Cell 2021; 20:e13293. [PMID: 33528912 PMCID: PMC7884045 DOI: 10.1111/acel.13293] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 11/23/2020] [Accepted: 12/01/2020] [Indexed: 01/23/2023] Open
Abstract
Privileged by rapid increase in available epigenomic data, epigenome-wide association studies (EWAS) are to make a profound contribution to understand the molecular mechanism of DNA methylation in cognitive aging. Current statistical methods used in EWAS are dominated by models based on multiple assumptions, for example, linear relationship between molecular profiles and phenotype, normal distribution for the methylation data and phenotype. In this study, we applied an assumption-free method, the generalized correlation coefficient (GCC), and compare it to linear models, namely the linear mixed model and kinship model. We use DNA methylation associated with a cognitive score in 400 and 206 twins as discovery and replication samples respectively. DNA methylation associated with cognitive function using GCC, linear mixed model, and kinship model, identified 65 CpGs (p < 1e-04) from discovery sample displaying both nonlinear and linear correlations. Replication analysis successfully replicated 9 of these top CpGs. When combining results of GCC and linear models to cover diverse patterns of relationships, we identified genes like KLHDC4, PAPSS2, and MRPS18B as well as pathways including focal adhesion, axon guidance, and some neurological signaling. Genomic region-based analysis found 15 methylated regions harboring 11 genes, with three verified in gene expression analysis, also the 11 genes were related to top functional clusters including neurohypophyseal hormone and maternal aggressive behaviors. The GCC approach detects valuable methylation sites missed by traditional linear models. A combination of methylation markers from GCC and linear models enriched biological pathways sensible in neurological function that could implicate cognitive performance and cognitive aging.
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Affiliation(s)
- Afsaneh Mohammadnejad
- Unit of Epidemiology, Biostatistics and BiodemographyDepartment of Public HealthUniversity of Southern DenmarkOdenseDenmark
| | - Mette Soerensen
- Unit of Epidemiology, Biostatistics and BiodemographyDepartment of Public HealthUniversity of Southern DenmarkOdenseDenmark
- Unit of Human GeneticsDepartment of Clinical ResearchUniversity of Southern DenmarkOdenseDenmark
- Department of Clinical Biochemistry and PharmacologyOdense University HospitalOdenseDenmark
| | - Jan Baumbach
- Computational BiomedicineDepartment of Mathematics and Computer ScienceUniversity of Southern DenmarkOdenseDenmark
- Chair of Experimental BioinformaticsTUM School of Life SciencesTechnical University of MunichMunichGermany
| | - Jonas Mengel‐From
- Unit of Epidemiology, Biostatistics and BiodemographyDepartment of Public HealthUniversity of Southern DenmarkOdenseDenmark
- Unit of Human GeneticsDepartment of Clinical ResearchUniversity of Southern DenmarkOdenseDenmark
| | - Weilong Li
- Unit of Epidemiology, Biostatistics and BiodemographyDepartment of Public HealthUniversity of Southern DenmarkOdenseDenmark
- Population Research UnitFaculty of Social SciencesUniversity of HelsinkiHelsinkiFinland
| | - Jesper Lund
- Unit of Epidemiology, Biostatistics and BiodemographyDepartment of Public HealthUniversity of Southern DenmarkOdenseDenmark
- Digital Health & Machine Learning Research GroupHasso Plattner Institute for Digital EngineeringPotsdamGermany
| | - Shuxia Li
- Unit of Epidemiology, Biostatistics and BiodemographyDepartment of Public HealthUniversity of Southern DenmarkOdenseDenmark
| | - Lene Christiansen
- Unit of Epidemiology, Biostatistics and BiodemographyDepartment of Public HealthUniversity of Southern DenmarkOdenseDenmark
- Department of Clinical ImmunologyCopenhagen University HospitalRigshospitaletCopenhagen ØDenmark
| | - Kaare Christensen
- Unit of Epidemiology, Biostatistics and BiodemographyDepartment of Public HealthUniversity of Southern DenmarkOdenseDenmark
- Unit of Human GeneticsDepartment of Clinical ResearchUniversity of Southern DenmarkOdenseDenmark
| | - Jacob V. B. Hjelmborg
- Unit of Epidemiology, Biostatistics and BiodemographyDepartment of Public HealthUniversity of Southern DenmarkOdenseDenmark
| | - Qihua Tan
- Unit of Epidemiology, Biostatistics and BiodemographyDepartment of Public HealthUniversity of Southern DenmarkOdenseDenmark
- Unit of Human GeneticsDepartment of Clinical ResearchUniversity of Southern DenmarkOdenseDenmark
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Narimani M, Esmaeilzadeh S, Pesola AJ, Haapala EA, Heidari B, Azevedo LB. Allometrically scaled explosive strength, but not static strength or maximal oxygen uptake is associated with better central processing time in young males. J Sports Med Phys Fitness 2020; 60:947-956. [PMID: 32253892 DOI: 10.23736/s0022-4707.20.10273-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND We aimed to examine the associations of cardiorespiratory fitness (CRF), static strength and explosive strength with cognitive functions in young males. METHODS Eighty-six young males (age 16-24 years) participated in the study and took part in a number of tests including: static strength (grip strength test), explosive strength (Sargent jump test), and CRF (via direct measure of maximal oxygen uptake [VO2max]). Static strength and explosive strength were scaled by allometrically modeled skeletal muscle mass (SMM) and height while VO2max was scaled by SMM and body mass (BM). Cognition was assessed by inhibitory control, simple and choice reaction time tasks using computerized Cambridge Neuropsychological Test Battery (CANTAB). Central processing time was measured by surface electromyography changes in isometric contraction response to an audio stimulus. RESULTS VO2max scaled by BM (but not SMM), was associated with better central processing time and stop-signal reaction time (SSRT). Explosive strength was also associated with better central processing time independent of VO2max. However, static strength was not associated with cognition. CONCLUSIONS The results suggest that explosive strength is a better predictor of central processing than static strength or VO2max in young males. Longitudinal studies are needed to examine whether explosive strength training in youth would improve central processing time.
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Affiliation(s)
- Mohammad Narimani
- Department of Psychology, University of Mohaghegh Ardabili, Ardabil, Iran -
| | - Samad Esmaeilzadeh
- Department of Psychology, University of Mohaghegh Ardabili, Ardabil, Iran.,Active Life Lab, South-Eastern Finland University of Applied Sciences, Mikkeli, Finland
| | - Arto J Pesola
- Active Life Lab, South-Eastern Finland University of Applied Sciences, Mikkeli, Finland
| | - Eero A Haapala
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Behrouz Heidari
- Department of Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Liane B Azevedo
- School of Human and Health Sciences, University of Huddersfield, Huddersfield, UK
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