Abstract:
:The main goal of this study was to assess the impact of the cambered bar (CB) during the bench press exercise on power output and bar velocity when compared to a standard bar (SB). Ten healthy strength-trained men (age = 27.9 ± 3.7 years; body mass = 90.1 ± 12.5 kg; resistance training experience = 6.5 ± 2.7 years; bench press one-repetition maximum (1RM) = 118.5 ± 21 kg) performed a single set of 3 repetitions of the bench press exercise with an SB and a CB at 50%1RM to assess differences in peak power output (PP), mean power output (MP), peak bar velocity (PV), and mean bar velocity (MV), range of motion (ROM), and positive work time under load (TUL) between conditions. The t-test indicated significantly higher mean ROM for the cambered bar in comparison to the standard bar (52.7 vs. 44.9 cm; P < 0.01; ES = 1.40). Further, there was a significantly higher PP (907 vs. 817 W; P < 0.01; ES = 0.35), MP (556 vs. 496 W; P < 0.01; ES = 0.46), PV (1.24 vs. 1.14 m/s; P < 0.01; ES = 0.35) and MV (0.89 vs. 0.82 m/s; P < 0.01; ES = 0.34) for the CB condition when compared to the SB. A significantly longer TUL for the CB was observed, when compared to the SB (1.89 vs. 1.51 s; P < 0.01; ES = 1.38). The results of this study showed that the CB significantly increased power output and bar velocity in the bench press exercise at 50%1RM compared to the SB. Therefore, the additional ROM, made possible through the use of the CB, allows for the acceleration of the bar through a significantly longer displacement, which has a positive impact on power output. However, a simultaneous increase in TUL may cause higher fatigue when the bench press is performed with the CB compared to the SB.
journal_name
Front Physioljournal_title
Frontiers in physiologyauthors
Krzysztofik M,Zajac A,Żmijewski P,Wilk Mdoi
10.3389/fphys.2020.577400subject
Has Abstractpub_date
2020-10-20 00:00:00pages
577400issn
1664-042Xjournal_volume
11pub_type
杂志文章abstract::Research on the effects of climate change in the marine environment continues to accelerate, yet we know little about the effects of multiple climate drivers in more complex, ecologically relevant settings - especially in sub-tropical and tropical systems. In marine ecosystems, climate change (warming and freshening f...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2019.00373
更新日期:2019-04-04 00:00:00
abstract::Background: Understanding the microscopic dynamics of the beating heart has been challenging due to the technical nature of imaging with micrometer resolution while the heart moves. The development of multiphoton microscopy has made in vivo, cell-resolved measurements of calcium dynamics and vascular function possible...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2018.00969
更新日期:2018-07-31 00:00:00
abstract::Ontologies and standards are very important parts of today's bioscience research. With the rapid increase of biological knowledge, they provide mechanisms to better store and represent data in a controlled and structured way, so that scientists can share the data, and utilize a wide variety of software and tools to ma...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2011.00005
更新日期:2011-02-21 00:00:00
abstract::Zymogens are delivered to the arterial wall by radial transmural convection. Plasminogen can be activated within the arterial wall to produce plasmin, which is involved in evolution of the atherosclerotic plaque. Vascular smooth muscle cells (vSMCs) protect the vessels from proteolytic injury due to atherosclerosis de...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2016.00273
更新日期:2016-06-30 00:00:00
abstract::The anti-aging function of Klotho gene has been implicated in age-related diseases. The physiological importance of Klotho in the progression of arterial stiffness with aging, however, remains unclear. The goal of this study is to determine the correlation of circulating Klotho with early age-related aortic stiffening...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2020.00591
更新日期:2020-06-09 00:00:00
abstract::At a fundamental level most genes, signaling pathways, biological functions and organ systems are highly conserved between man and all vertebrate species. Leveraging this conservation, researchers are increasingly using the experimental advantages of the amphibian Xenopus to model human disease. The online Xenopus res...
journal_title:Frontiers in physiology
pub_type: 杂志文章,评审
doi:10.3389/fphys.2019.00154
更新日期:2019-02-26 00:00:00
abstract::Background: Chinese herbal medicine (CHM) has a good effect of alleviating symptoms and improving quality of life and exercise tolerance in patients with heart failure with preserved ejection fraction (HFpEF), but it wasn't sufficiently valued and promoted because of the lack of evidence-based medical evidence. Aim: T...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2018.01420
更新日期:2018-10-26 00:00:00
abstract::Objective: Despite the improvement in ventricular assist device (VAD) therapy in adults and in adolescents, in infant population only Berlin Heart EXCOR (BHE) is licensed as long term VAD to bridge children to Heart Transplantation (HTx). Particularly demanding in terms of morbidity and mortality are smallest patients...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2016.00614
更新日期:2016-12-06 00:00:00
abstract::Adaptation of arm reaching in a novel force field involves co-contraction of upper limb muscles, but it is not known how the co-ordination of multiple muscle activation is orchestrated. We have used intermuscular coherence (IMC) to test whether a coherent intermuscular coupling between muscle pairs is responsible for ...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2016.00668
更新日期:2017-01-09 00:00:00
abstract:Background:Interleukin-6 (IL-6) is released from skeletal muscle during exercise and systemic IL-6 levels therefore increase acutely in response to a single bout of exercise. We recently showed that an acute increase in IL-6 delayed gastric emptying rate and improved postprandial glycemia. Here we investigate whether r...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2019.01249
更新日期:2019-10-04 00:00:00
abstract::Preeclampsia, a pregnancy-specific disorder, presents a major health problem during gestation, but is also associated with increased risk for cardiovascular complications in later life. We aimed to investigate whether chronic stress experience and preeclampsia may have additive adverse effects on the cardiac ability t...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2018.01237
更新日期:2018-09-03 00:00:00
abstract::[This corrects the article DOI: 10.3389/fphys.2016.00593.]. ...
journal_title:Frontiers in physiology
pub_type: 杂志文章,已发布勘误
doi:10.3389/fphys.2019.00648
更新日期:2019-05-22 00:00:00
abstract::Heart failure with preserved ejection fraction (HFpEF) is an increasingly studied entity accounting for 50% of all diagnosed heart failure and that has claimed its own dignity being markedly different from heart failure with reduced EF in terms of etiology and natural history (Graziani et al., 2018). Recently, a growi...
journal_title:Frontiers in physiology
pub_type: 杂志文章,评审
doi:10.3389/fphys.2019.01347
更新日期:2019-11-05 00:00:00
abstract::Yeast-like symbiotes (YLS), harbored in the abdomen fat-body cells of the rice brown planthopper (BPH), Nilaparvata lugens Stål (Hemiptera: Delphacidae), are vital to the growth and reproduction of their host. It is feasible to manipulate BPH infestation on rice by inhibiting YLS using fungicide. In this study, the fu...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2019.00089
更新日期:2019-02-11 00:00:00
abstract::Pinocembrin (PIN) is a natural flavonoid widely found in bee propolis with potent gastrointestinal protective effects. In consequence, PIN has great potential in preventing inflammatory bowel diseases (IBDs) while scant information is available. In this study, a dextran sulfate sodium (DSS)-induced rats ulcerative col...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2019.00908
更新日期:2019-07-19 00:00:00
abstract::This study investigates human performance in a cyclic Fitts task at three different scales of observation, either in the presence (difficult condition) or in the absence (easy condition) of a speed-accuracy trade-off. At the fastest scale, the harmonicity of the back and forth movements, which reflects the dissipation...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2012.00116
更新日期:2012-05-23 00:00:00
abstract::Skeletal muscles are large cells with multiple nuclei that are precisely positioned. The importance of the correct nuclear position is highlighted by the correlation between mispositioned nuclei and muscle disease (Spiro et al., 1966; Gueneau et al., 2009). Myonuclei are generally considered to be equivalent and there...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2018.01531
更新日期:2018-11-01 00:00:00
abstract::Mollusk shells are products of biomineralization and possess excellent mechanical properties, and shell matrix proteins (SMPs) have important functions in shell formation. A novel SMP with a PDZ domain (PDZ-domain-containing-protein-1, PDCP-1) was identified from the shell matrices of Mytilus coruscus. In this study, ...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2020.543758
更新日期:2020-10-02 00:00:00
abstract::Inflammation-induced impaired function of vascular endothelium may cause leakage of plasma proteins that can lead to edema. Proteins may leave the vascular lumen through two main paracellular and transcellular pathways. As the first involves endothelial cell (EC) junction proteins and the second caveolae formation, th...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2012.00166
更新日期:2012-05-31 00:00:00
abstract:Objective:Polycystin-1 (PC-1) is a protein encoded by the gene of polycystic kidney disease-1 (PKD-1). This study was designed to investigate the regulatory mechanisms of PC-1 on phenotypes of aortic vascular smooth muscle cells (VSMCs) and functions of extracellular matrix (ECM) in thoracic aortic dissection (TAD). M...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2020.548055
更新日期:2020-09-24 00:00:00
abstract::Voltage-gated potassium (Kv) channels shape the action potentials of excitable cells and regulate membrane potential and ion homeostasis in excitable and non-excitable cells. With 40 known members in the human genome and a variety of homomeric and heteromeric pore-forming α subunit interactions, post-translational mod...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2012.00231
更新日期:2012-06-28 00:00:00
abstract::Many natural phenomena display "self-organized criticality" (SOC), (Bak et al., 1987). This refers to spatially extended systems for which patterns of activity characterized by different lengthscales can occur with a probability density that follows a power law with pattern size. Differently from power laws at phase t...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2012.00350
更新日期:2012-09-03 00:00:00
abstract::Long-duration spaceflight has been shown to negatively affect the lumbopelvic muscles of crewmembers. Through analysis of computed tomography scans of crewmembers on 4- to 6-month missions equipped with the interim resistive exercise device, the structural deterioration of the psoas, quadratus lumborum, and paraspinal...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2019.00627
更新日期:2019-05-21 00:00:00
abstract::Coral reef communities are undergoing marked declines due to a variety of stressors including disease. The sea fan coral, Gorgonia ventalina, is a tractable study system to investigate mechanisms of immunity to a naturally occurring pathogen. Functional studies in Gorgonia ventalina immunity indicate that several key ...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2013.00180
更新日期:2013-07-25 00:00:00
abstract::Fibrosis is intimately linked to wound healing and is one of the largest causes of wound-related morbidity. While scar formation is the normal and inevitable outcome of adult mammalian cutaneous wound healing, scarring varies widely between different anatomical sites. The spectrum of craniofacial wound healing spans a...
journal_title:Frontiers in physiology
pub_type: 杂志文章,评审
doi:10.3389/fphys.2019.00322
更新日期:2019-03-29 00:00:00
abstract::As arteries become stiffer with aging, reflected waves move faster and augment late systolic pressure. Few studies have described the age-related changes in both peripheral and central systolic blood pressures in populations. We investigated the age dependency of peripheral (pSBP) and central (cSBP) systolic pressure ...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2012.00209
更新日期:2012-06-15 00:00:00
abstract::The rare opportunity to study a human fetus showing bilateral clefting of the lower lip along with other associated anomalies resembling those of the equally rare Pena-Shokeir phenotype prompts this report. The scarcity of reports on bilateral clefts of the lower lip has strengthened the conventional understanding or,...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2012.00333
更新日期:2012-08-24 00:00:00
abstract::Acute liver failure (ALF) is characterized by a sudden and severe deterioration of liver function, typically mirrored by a marked increase of the international normalized ratio (INR) and hepatic encephalopathy (HE). Due to various possible causes hepatocytes get damaged via either apoptotic or necrotic pathways. Antic...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2012.00340
更新日期:2012-08-28 00:00:00
abstract::Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) is a debilitating multi-systemic chronic illness of unknown etiology, classified as a neurological disorder by the World Health Organization (WHO). The symptomatology of the condition appears to emanate from a variety of sources of chronic neurological distur...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2017.00088
更新日期:2017-02-17 00:00:00
abstract::Drosophila melanogaster has served as an excellent genetic model to decipher the molecular basis of the circadian clock. Two key proteins, PERIOD (PER) and TIMELESS (TIM), are particularly well explored and a number of various arrhythmic, slow, and fast clock mutants have been identified in classical genetic screens. ...
journal_title:Frontiers in physiology
pub_type: 杂志文章
doi:10.3389/fphys.2019.01442
更新日期:2019-12-03 00:00:00