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Endurance Fitness

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https://www.readbyqxmd.com/read/28078668/mitochondrial-adaptations-to-exercise-in-human-skeletal-muscle-a-possible-role-for-cristae-density-as-a-determinant-of-muscle-fitness
#1
Christopher G R Perry
Skeletal muscle possesses a remarkable plasticity in response to repeated exercise challenges (i.e. exercise 'training'). A hallmark phenotypic change is an increase in the ability to sustain contraction and resist fatigue. Such increased muscle endurance is linked, in part, to an improved ability to sustain ATP synthesis aerobically through coordinated enhancements in the delivery of oxygen (e.g. cardiorespiratory, vascular adaptations) and its utilization within skeletal muscle mitochondria for the oxidation of fat and carbohydrates...
January 11, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28073325/the-moderating-role-of-insulin-like-growth-factor-1-in-the-relationship-between-cognitive-and-aerobic-endurance-change
#2
Jason R Anderson, Dayana Calvo, Ellen Glickman, John Gunstad, Mary Beth Spitznagel
BACKGROUND: Improvements in cognition often accompany fitness improvements in older adults, and research suggests insulin-like growth factor 1 (IGF-1) may influence this association. No prior work has examined this in mild cognitive impairment (MCI). We predicted that IGF-1 would moderate the relationship between cognition and aerobic endurance improvement, such that greater baseline IGF-1 would accompany a stronger relationship between cognition and aerobic endurance change. METHOD: Twenty-seven individuals with MCI completed assessments of aerobic endurance (2-minute step test [2MST]) and global cognition (Modified Mini-Mental State [3MS]) before and after a 6-month period of twice-weekly exercise...
January 1, 2017: Journal of Geriatric Psychiatry and Neurology
https://www.readbyqxmd.com/read/28072511/resistance-switching-characteristics-induced-by-o2-plasma-treatment-of-an-indium-tin-oxide-film-for-use-as-an-insulator-in-resistive-random-access-memory
#3
Po-Hsun Chen, Ting-Chang Chang, Kuan-Chang Chang, Tsung-Ming Tsai, Chih-Hung Pan, Min-Chen Chen, Yu-Ting Su, Chih-Yang Lin, Yi-Ting Tseng, Hui-Chun Huang, Huaqiang Wu, Ning Deng, He Qian, Simon M Sze
In this study, an O2 inductively coupled plasma (ICP) treatment was developed in order to modify the characteristics of indium tin oxide (ITO) film for use as an insulator in resistive random access memory (RRAM). After the O2 plasma treatment, the previously conductive ITO film is oxidized and becomes less conductive. In addition, after capping the same ITO material for use as a top electrode, we found that the ITO/ITO(O2 plasma)/TiN device exhibits very stable and robust resistive switching characteristics...
January 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28067866/horizontally-acquired-at-rich-genes-in-escherichia-coli-cause-toxicity-by-sequestering-rna-polymerase
#4
Lisa E Lamberte, Gabriele Baniulyte, Shivani S Singh, Anne M Stringer, Richard P Bonocora, Mathew Stracy, Achillefs N Kapanidis, Joseph T Wade, David C Grainger
Horizontal gene transfer permits rapid dissemination of genetic elements between individuals in bacterial populations. Transmitted DNA sequences may encode favourable traits. However, if the acquired DNA has an atypical base composition, it can reduce host fitness. Consequently, bacteria have evolved strategies to minimize the harmful effects of foreign genes. Most notably, xenogeneic silencing proteins bind incoming DNA that has a higher AT content than the host genome. An enduring question has been why such sequences are deleterious...
January 9, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28064026/systematic-review-of-field-based-physical-fitness-tests-for-children-and-adolescents-with-intellectual-disabilities
#5
REVIEW
Marieke Wouters, Heleen M Evenhuis, Thessa I M Hilgenkamp
BACKGROUND: Testing physical fitness in children and adolescents with intellectual disabilities (ID) can be challenging. This review provides an overview on psychometric properties of field-based physical fitness tests studied in children and adolescents with ID. METHODS: A literature search was performed in March 2014. Studies were included if they evaluated feasibility, reliability and/or validity of a field-based physical fitness test in children and adolescents with ID...
January 5, 2017: Research in Developmental Disabilities
https://www.readbyqxmd.com/read/28054492/match-running-performance-and-skill-execution-improves-with-age-but-not-the-number-of-disposals-in-young-australian-footballers
#6
Paul B Gastin, Christie Tangalos, Lorena Torres, Sam Robertson
This study investigated age-related differences in maturity, physical and functional characteristics and playing performance in youth Australian Football (AF). Young male players (n = 156) were recruited from 12 teams across 6 age groups (U10-U15) of a recreational AF club. All players were tested for body size, maturity and fitness. Player performance was assessed during a match in which disposals (kicks and handballs) and their effectiveness were coded from a video recording and match running performance measured using Global Positioning System...
January 5, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28052570/effects-of-the-youth-fit-4-life-physical-activity-nutrition-protocol-on-body-mass-index-fitness-and-targeted-social-cognitive-theory-variables-in-9-to-12-year-olds-during-after-school-care
#7
James J Annesi, Stephanie M Walsh, Brittney L Greenwood, Nicole Mareno, Jennifer L Unruh-Rewkowski
AIM: Childhood overweight and obesity is unacceptably high in industrialised nations. School-based interventions have largely been atheoretical and ineffective. This study aimed to test a new theory-based protocol for its effects on measures of fitness and body mass index (BMI), and its proposed psychosocial mediators, during elementary after-school (out-of-school hours) care. METHODS: Nine- to 12-year-old participants of YMCA-based after-school care in the southeastern Unites States were randomised into either the experimental Youth Fit 4 Life (YF4L) treatment group (n = 86) or a typical care group (n = 55) for 45 min/day...
January 4, 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28051356/state-of-science-situation-awareness-in-individuals-teams-and-systems
#8
N A Stanton, P M Salmon, G H Walker, E Salas, P A Hancock
Our review addresses one of the most used, but debated, topics in Ergonomics: Situation Awareness (SA). We examine and elaborate upon key SA models. These models are divided into individual SA, team SA and systems SA categories. Despite, or perhaps because of, the debates surrounding SA it remains an enduring theme for research and practice in the domain of Ergonomics, now for over two decades. A contingent approach, which seeks to match different models of SA to different types of ergonomics problem, enables the differences between positions to be revealed and reconciled, and the practitioner guided towards optimum methodological solutions...
January 4, 2017: Ergonomics
https://www.readbyqxmd.com/read/28050926/normative-values-for-cardiorespiratory-fitness-testing-among-us-children-aged-6-11-years
#9
Jaime J Gahche, Brian K Kit, Janet E Fulton, Dianna D Carroll, Thomas Rowland
BACKGROUND: Nationally representative normative values for cardiorespiratory fitness (CRF) have not been described for US children since the mid 1980's. OBJECTIVE: To provide sex- and age-specific normative values for CRF of US children aged 6-11 years. METHODS: Data from 624 children aged 6-11 years who participated in the CRF testing as part of the 2012 National Health and Nutrition Examination Survey National Youth Fitness Survey, a cross-sectional survey, were analyzed...
January 4, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28039888/aerobic-training-in-myotonia-congenita-effect-on-myotonia-and-fitness
#10
Grete Andersen, Nicoline Løkken, John Vissing
INTRODUCTION: Exercise has not been investigated in myotonia congenita (MC). We investigated whether regular aerobic training can reduce myotonia and improve fitness. METHODS: Untrained patients with MC (age: 24-62 years, n=6) completed 28±3 sessions of 30-minute cycle ergometer training at 75% of maximal capacity for 11±1 weeks. Fitness was evaluated by maximal oxygen uptake. The level of myotonia was assessed by the Myotonia Behavior Scale, 14 step stair test, timed up and go test, and hand and eye closure-open tests...
December 31, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/28031763/evolution-of-determinant-factors-of-repeated-sprint-ability
#11
Fernando Pareja-Blanco, Luis Suarez-Arrones, David Rodríguez-Rosell, Manuel López-Segovia, Pedro Jiménez-Reyes, Beatriz Bachero-Mena, Juan José González-Badillo
The aim of this study was to investigate the changes in the relationships between repeated sprint ability (RSA) and anthropometric measures as well as fitness qualities in soccer players. Twenty-one professional soccer players performed several anthropometric and physical tests including countermovement vertical jumps (CMJs), a straight-line 30 m sprint (T30), an RSA test (6 x 20 + 20 m with 20 s recovery), a progressive isoinertial loading test in a full squat, a Yo-Yo Intermittent Recovery Test Level-1 (YYIRT-1) and a 20 m shuttle run test (20mSRT)...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28030533/physical-and-physiological-profile-of-wrestler-athletes-short-review
#12
Helmi Chaabene, Yassine Negra, Raja Bouguezzi, Bessem Mkaouer, Emerson Franchini, Ursula Julio, Younés Hachana
Wrestling is one of the oldest combat sports, disputed since the ancient Greek Olympic Games. This combat sport discipline has caught the attention of scientists since 1943 which is the date that matches the appearance of the first scientific research dealing with wrestling. The current short review aimed to summarize and critically analyze the scientific literature related to wrestling's physical and physiological attributes and to provide practical recommendations for testing/training together with new perspective and areas of future scientific research...
December 24, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28011098/serum-igf-i-igfbp-3-and-als-concentrations-and-physical-performance-in-young-swimmers-during-a-training-season
#13
H Tourinho Filho, M Pires, E F Puggina, M Papoti, R Barbieri, C E Martinelli
INTRODUCTION: The GH/IGF-I axis is a system of growth mediators, receptors, and binding proteins that regulate somatic and tissue growth; and it has been shown that exercise programs are related to the anabolic function of this axis. OBJECTIVE: The aim of this study was to analyse the changes of serum IGF-I concentration and that of its binding proteins IGFBP-3 and ALS in adolescent swimmers at different stages of a training season, and compare them with physical performance parameters and body composition of the athletes...
December 18, 2016: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/28006024/a-novel-approach-to-identifying-trajectories-of-mobility-change-in-older-adults
#14
Rachel E Ward, Marla K Beauchamp, Nancy K Latham, Suzanne G Leveille, Sanja Percac-Lima, Laura Kurlinski, Pengsheng Ni, Richard Goldstein, Alan M Jette, Jonathan F Bean
OBJECTIVES: To validate trajectories of late-life mobility change using a novel approach designed to overcome the constraints of modest sample size and few follow-up time points. METHODS: Using clinical reasoning and distribution-based methodology, we identified trajectories of mobility change (Late Life Function and Disability Instrument) across 2 years in 391 participants age ≥65 years from a prospective cohort study designed to identify modifiable impairments predictive of mobility in late-life...
2016: PloS One
https://www.readbyqxmd.com/read/28005637/effects-of-physical-training-and-fitness-on-running-injuries-in-physically-active-young-men
#15
Tyson L Grier, Michelle Canham-Chervak, Morgan K Anderson, Timothy T Bushman, Bruce H Jones
Grier, TL, Canham-Chervak, M, Anderson, MK, Bushman, TT, and Jones, BH. Effects of physical training and fitness on running injuries in physically active young men. J Strength Cond Res 31(1): 207-216, 2017-The purpose of this investigation was to determine the effects of physical training (PT) and fitness on risks for running-related injuries (RRIs) in physically active young men. Personal characteristics, PT, Army Physical Fitness Test scores, and injury data were obtained by survey. Army Physical Fitness Test variables (push-ups, sit-ups, and 2-mile run) were converted into quartiles (Q), where Q1 = lowest performance and Q4 = highest performance...
January 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27996272/il-6-linkage-to-exercise-induced-shifts-in-lipid-related-metabolites-a-metabolomics-based-analysis
#16
David C Nieman, Wei Sha, Kirk L Pappan
Metabolomics profiling and bioinformatics technologies were used to determine the relationship between exercise-induced increases in IL-6 and lipid-related metabolites. Twenty-four male runners (age 36.5±1.8 y) ran on treadmills to exhaustion (2.26±0.01 h, 24.9±1.3 km, 69.7±1.9% VO2max). Vastus lateralis muscle biopsy and blood samples were collected before and immediately after running, and showed a 33.7±4.2% decrease in muscle glycogen, 39.0±8.8-, 2.4±0.3-, and 1.4±0.1-fold increases in plasma IL-6, IL-8, and MCP-1, respectively, and 95...
December 20, 2016: Journal of Proteome Research
https://www.readbyqxmd.com/read/27991694/characterizing-severe-and-enduring-anorexia-nervosa-an-empirical-approach
#17
Jennifer E Wildes, Kelsie T Forbush, Kelsey E Hagan, Marsha D Marcus, Evelyn Attia, Loren M Gianini, Wei Wu
Targeted approaches for the treatment of severe and enduring anorexia nervosa (SE-AN) have been recommended, but there is no consensus definition of SE-AN to inform research and clinical practice. This study aimed to take initial steps toward developing an empirically based definition of SE-AN by characterizing associations among putative indicators of severity and chronicity in eating disorders. Patients with AN (N = 355) completed interviews and questionnaires at treatment admission and discharge; height and weight were assessed to calculate body mass index (BMI)...
December 19, 2016: International Journal of Eating Disorders
https://www.readbyqxmd.com/read/27957824/physical-fitness-level-affects-perception-of-chronic-stress-in-military-trainees
#18
Carolin Tuch, Thomas Teubel, Roberto La Marca, Lilian Roos, Hubert Annen, Thomas Wyss
This study investigated whether physical fitness affects the perception of chronic stress in military trainees while controlling for established factors influencing stress perception. The sample consisted of 273 men (20.23 ± 1.12 years, 73.56 ± 10.52 kg, 1.78 ± 0.06 m). Physical fitness was measured by progressive endurance run (maximum oxygen uptake; VO2 max), standing long jump, seated shot put, trunk muscle strength, and one leg standing test. Perceived stress was measured using the Perceived Stress Questionnaire in Weeks 1 and 11 of basic military training (BMT)...
December 13, 2016: Stress and Health: Journal of the International Society for the Investigation of Stress
https://www.readbyqxmd.com/read/27956540/effective-translation-of-research-to-practice-hospital-based-rehabilitation-program-improves-health-related-physical-fitness-and-quality-of-life-of-cancer-survivors
#19
Amy A Kirkham, Riggs J Klika, Tara Ballard, Paul Downey, Kristin L Campbell
BACKGROUND: Although exercise has been widely established as an efficacious rehabilitative therapy for cancer survivors in rigorously designed research studies, demonstration of translation of this research into clinical oncology practice is needed. The purpose of this study was to evaluate the effectiveness of a real-world cancer rehabilitation program implemented within a healthcare setting. PATIENTS AND METHODS: This study involved 299 adult cancer survivors enrolled in a hospital-based, supervised, individualized, cancer rehabilitation program...
December 2016: Journal of the National Comprehensive Cancer Network: JNCCN
https://www.readbyqxmd.com/read/27951724/-intervention-exercise-program-for-cancer-patients-with-breast-cancer
#20
A Pokorná, R Střeštíková
BACKGROUND: Movement is a sign of life and regular physical activity has an indisputable influence on each and every person. When applied selectively to patients after cancer therapy, physical activity, including rehabilitation, positively contributes to complete recuperation and improves quality of life. Our interventional exercise program for cancer patients was prepared and implemented on the basis of reports in the medical literature and on the lecturers own experience. The interventional exercise program was divided into two parts - body and mind and body fitness...
2016: Klinická Onkologie: Casopis Ceské a Slovenské Onkologické Spolecnosti
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