9,504 results match your criteria vertical muscle


Trunk kinematics and muscle activation patterns during stand-to-sit movement and the relationship with postural stability in aging.

Gait Posture 2021 Mar 24;86:292-298. Epub 2021 Mar 24.

University of Maryland School of Medicine, Department of Physical Therapy & Rehabilitation Science, Baltimore, MD, 21201, United States. Electronic address:

Background: Stand-to-sit (StandTS) movement is an important functional activity that can be challenging for older adults due to age-related changes in neuromotor control. Although trunk flexion, eccentric contraction of the rectus femoris (RF), and coordination of RF and biceps femoris (BF) muscles are important to the StandTS task, the effects of aging on these and related outcomes are not well studied.

Research Question: What are the age-related differences in trunk flexion, lower extremity muscle activation patterns, and postural stability during a StandTS task and what is the relationship between these variables?

Methods: Ten younger and ten older healthy adults performed three StandTS trials at self-selected speeds. Read More

View Article and Full-Text PDF

Gender-specific analysis for the association between trunk muscle mass and spinal pathologies.

Sci Rep 2021 Apr 9;11(1):7816. Epub 2021 Apr 9.

Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka, 545-8585, Japan.

We investigated the relationship between trunk muscle mass and spinal pathologies by gender. This multicenter cross-sectional study included patients aged ≥ 30 years who visited a spinal outpatient clinic. Trunk and appendicular muscle mass were measured using bioelectrical impedance analysis. Read More

View Article and Full-Text PDF

Early biomechanical outcome in patients with acetabular fractures treated using the pararectus approach: a gait and stair climb analysis study.

Eur J Trauma Emerg Surg 2021 Apr 9. Epub 2021 Apr 9.

Department of Trauma and Orthopaedic Surgery, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Erlangen, Germany.

Purpose: Patients with surgically treated acetabular fractures using extensive dissection of hip muscles demonstrate an incomplete biomechanical recovery and limited joint mobility during movement. The purpose of this study was to evaluate the early biomechanical outcome in a series of patients with acetabular fractures treated using the less invasive anatomical pararectus approach.

Methods: Eight patients (48 ± 14 years, BMI 25. Read More

View Article and Full-Text PDF

Force-Sensitive Mat for Vertical Jump Measurement to Assess Lower Limb Strength: Validity and Reliability Study.

JMIR Mhealth Uhealth 2021 Apr 9;9(4):e27336. Epub 2021 Apr 9.

Electrical/Electronics Engineering and Communications Department, EUP Teruel, Universidad de Zaragoza, Teruel, Spain.

Background: Vertical jump height is widely used in health care and sports fields to assess muscle strength and power from lower limb muscle groups. Different approaches have been proposed for vertical jump height measurement. Some commonly used approaches need no sensor at all; however, these methods tend to overestimate the height reached by the subjects. Read More

View Article and Full-Text PDF

Effect of velocity loss during squat training on neuromuscular performance.

Scand J Med Sci Sports 2021 Apr 7. Epub 2021 Apr 7.

Physical Performance & Sports Research Center, Universidad Pablo de Olavide, Seville, Spain.

This study aimed to compare the effects of three resistance training (RT) programs differing in the magnitude of velocity loss (VL) allowed in each exercise set: 10%, 30% or 45% on changes in strength, vertical jump, sprint performance and EMG variables. Thirty-three young men were randomly assigned into three experimental groups (VL10%, VL30% and VL45%; n=11 each) that performed a velocity-based RT program for 8 weeks using only the full-squat exercise (SQ). Training load (55-70% 1RM), frequency (2 sessions/week), number of sets (3) and inter-set recovery (4 min) were identical for all groups. Read More

View Article and Full-Text PDF

Alleviation of masticatory disturbance with an occlusal splint in a Duchenne muscular dystrophy patient.

Spec Care Dentist 2021 Apr 7. Epub 2021 Apr 7.

Department of Surgery, National Center Hospital, National Center of Neurology and Psychiatry, Kodaira, Japan.

Aim: To present an occlusal splint effective for alleviating masticatory disturbance in Duchenne muscular dystrophy (DMD).

Case Report: A 13-year-old male DMD patient with masticatory disturbance presented with an open bite, with occlusal contact only between the first and second molars bilaterally and reduced masticatory performance. We applied an occlusal splint that achieved occlusal contact for all teeth and monitored its effects on masticatory function over 6 years. Read More

View Article and Full-Text PDF

Respecting Upper Facial Anatomy for Treating the Glabella with Neuromodulators to Avoid Medial Brow Ptosis - A Refined 3-Point Injection Technique.

J Cosmet Dermatol 2021 Apr 4. Epub 2021 Apr 4.

Private Practice, Cluj-Napoca, Romania.

Background: Current injection algorithms for treating the glabella rely on a five- or seven-point injection technique with possible medial eyebrow ptosis and lateral eyebrow elevation as undesirable outcomes.

Objective: The objective of this study was to investigate the efficacy and safety profile of a refined 3-point injection technique targeting horizontal and vertical glabellar lines.

Methods: A total of n=105 patients (27 males and 78 females) with a mean age of 40. Read More

View Article and Full-Text PDF

Influence of arch support heights on the internal foot mechanics of flatfoot during walking: A muscle-driven finite element analysis.

Comput Biol Med 2021 Mar 26;132:104355. Epub 2021 Mar 26.

Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong, China; The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, China. Electronic address:

Background: Different arch support heights of the customized foot orthosis could produce different effects on the internal biomechanics of the foot. However, quantitative evidence is scarce. Therefore, we aimed to investigate and quantify the influence of arch support heights on the internal foot biomechanics during walking stance. Read More

View Article and Full-Text PDF

Association between Kinesiophobia and Gait Asymmetry after ACL Reconstruction: Implications for Prevention of Reinjury.

Int J Environ Res Public Health 2021 Mar 22;18(6). Epub 2021 Mar 22.

Department of Sport Injuries and Corrective Exercises, Sport Sciences Research Institute, Tehran 1587958711, Iran.

Gait asymmetries have been documented in individuals after anterior cruciate ligament (ACL) reconstruction (ACLR). The relationship between gait asymmetry and associated psychological factors, however, is not yet known. This study aimed to examine the relationship between kinesiophobia (fear of reinjury) and asymmetry of vertical ground reaction force (vGRF) and lower-extremity muscular activity in individuals after ACLR during gait. Read More

View Article and Full-Text PDF

Kinematic Analysis of Water Polo Player in the Vertical Thrust Performance to Determine the Force-Velocity and Power-Velocity Relationships in Water: A Preliminary Study.

Int J Environ Res Public Health 2021 Mar 5;18(5). Epub 2021 Mar 5.

Sport Engineering Lab, Department of Industrial Engineering, "Tor Vergata" University of Rome, via del Politecnico 1, 00133 Rome, Italy.

Background: To date, studies on muscle force and power-velocity (F-v and P-v) relationships performed in water are absent.

Aim: The goal of this study is to derive the F-v and P-v regression models of water polo players in water vertical thrust performance at increasing load.

Methods: After use of a control object for direct linear transformation, displacement over the water and elapsed time was measured, by using a high-speed 2D-videoanalysis system, on 14 players involved in the study. Read More

View Article and Full-Text PDF

A Comparison of the Effect of Two Types of Whole Body Vibration Platforms on Fibromyalgia. A Randomized Controlled Trial.

Int J Environ Res Public Health 2021 Mar 15;18(6). Epub 2021 Mar 15.

Research Institute of Health Sciences (IUNICS-IdISBa), University of the Balearic Islands, 07122 Palma de Mallorca, Spain.

Whole body vibration has been proven to improve the health status of patients with fibromyalgia, providing an activation of the neuromuscular spindles, which are responsible for muscle contraction. The present study aimed to compare the effectiveness of two types of whole body vibrating platforms (vertical and rotational) during a 12-week training program. Sixty fibromyalgia patients (90% were women) were randomly assigned to one of the following groups: group A ( = 20), who performed the vibration training with a vertical platform; group B ( = 20), who did rotational platform training; or a control group C ( = 20), who did not do any training. Read More

View Article and Full-Text PDF

Joint Flexibility and Isometric Strength Parameters Are Not Relevant Determinants for Countermovement Jump Performance.

Int J Environ Res Public Health 2021 Mar 3;18(5). Epub 2021 Mar 3.

Institute of Human Movement Science, Sport and Health, University of Graz, Mozartgasse 14, A-8010 Graz, Austria.

Vertical jumps are of great importance as a performance predictor for many types of sports that require speed and agility. However, to date, it is not clear if flexibility and/or the strength of the different leg muscles are determinants for countermovement jump (CMJ) performance. Therefore, the purpose of this study was to relate isometric maximum voluntary contraction (MVC) torque and the flexibility of various muscle groups of the lower body with CMJ performance. Read More

View Article and Full-Text PDF

The Short-to mid-term Follow-up of Patients with Hirayama Disease after Anterior Cervical Discectomy and Fusion.

World Neurosurg 2021 Mar 30. Epub 2021 Mar 30.

Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai 200040, China. Electronic address:

Purpose: Surgical treatment has been widely used to treat patients with Hirayama Disease (HD) nowadays. However, post-operation follow-up with abundant samples is still scarce. This study investigated short-to mid-term clinical outcomes after anterior cervical discectomy and fusion (ACDF) among HD patients. Read More

View Article and Full-Text PDF

Influence of the Bar Position on Joint-Level Biomechanics During Isometric Pulling Exercises.

J Strength Cond Res 2021 Mar 31. Epub 2021 Mar 31.

Department of Physical Therapy, Program in Exercise Science, Marquette University, Milwaukee, Wisconsin; Department of Kinesiology & Sport Management, Texas Tech University, Lubbock, Texas; and Department of Intercollegiate Athletics, Marquette University, Milwaukee, Wisconsin.

Abstract: Ahn, N, Kim, H, Krzyszkowski, J, Roche, S, and Kipp, K. Influence of the bar position on joint-level biomechanics during isometric pulling exercises. J Strength Cond Res XX(X): 000-000, 2021-The purpose of this study was to investigate the influence of the bar position on ankle, knee, and hip net joint moments (NJMs), relative muscular effort (RME), and vertical ground reaction forces (GRFs) during isometric pulling exercises, such as the isometric midthigh pull. Read More

View Article and Full-Text PDF

Distribution and Transformation of Mercury in Subtropical Wild-Caught Seafood from the Southern Taiwan Strait.

Biol Trace Elem Res 2021 Apr 1. Epub 2021 Apr 1.

Key Laboratory of Estuarine Ecological Security and Environmental Health, Education Department of Fujian, Tan Kah Kee College, Xiamen University, Zhangzhou, 363105, China.

Wild-caught seafood contains significant amounts of mercury. Investigating the mercury accumulation levels in wild-caught seafood and analyzing its migration and transformation are of great value for assessing the health risks of mercury intake and for the tracking of mercury sources. We determined the concentrations and stable mercury isotopic compositions (δHg, ΔHg, ΔHg, and ΔHg) of 104 muscle samples collected from 38 species of seafood typically harvested from the Taiwan Shallow Fishing Ground (TSFG), Southern Taiwan Strait. Read More

View Article and Full-Text PDF

Feasibility of Two Different EMG-Based Pattern Recognition Control Paradigms to Control a Robot After Stroke - Case Study.

Proc IEEE RAS EMBS Int Conf Biomed Robot Biomechatron 2020 Nov-Dec;2020:833-838. Epub 2020 Oct 15.

Director of Center for Bionic Medicine at the Shirley Ryan Ability Lab, and Associate Professor with Departments of Biomedical Engineering and Physical Medicine and Rehabilitation at Northwestern University, Chicago, IL, 60611, USA.

Stroke often results in chronic motor impairment of the upper-extremity yet neither traditional- nor robotics-based therapy has been able to affect this in a profound way. Supporting the weak affected shoulder against gravity improves reaching distance and minimizes abnormal co-contraction of the elbow, wrist, and fingers after stroke. However, it is necessary to assess the feasibility and efficacy of real-time controllers for this population as technology advances and a wearable shoulder device comes closer to reality. Read More

View Article and Full-Text PDF
October 2020

Predictive Effect of Cervical Spinal Cord Compression and Corresponding Segmental Paravertebral Muscle Degeneration on the Severity of Symptoms in Patients with Cervical Spondylotic Myelopathy.

Spine J 2021 Mar 27. Epub 2021 Mar 27.

Department of Orthopedics, Fujian Medical University Union Hospital, Fuzhou 086-350001, China. Fujian Medical University, Fuzhou 086-350001, China. Electronic address:

Background Context: Previous studies have found that cervical sagittal parameters and spinal cord compression are important risk factors for cervical spondylotic myelopathy (CSM). An increasing number of scholars believe that cervical muscle condition is also one of the factors affecting the severity of symptoms in affected patients.

Purpose: To determine whether: the degree of corresponding segmental paravertebral muscle degeneration is related to the severity of symptoms in patients with CSM; the degree of cervical spinal cord compression can predict the severity of symptoms in patients with CSM. Read More

View Article and Full-Text PDF

Occlusal Vertical Dimension: Best Evidence Consensus Statement.

J Prosthodont 2021 Apr;30(S1):12-19

Private Practice, London, United Kingdom.

Purpose: Patients in need of extensive prosthodontic treatment may need restoration of their occlusal vertical dimension (OVD) due to tooth wear, tooth loss, or changes that have occurred to existing prostheses over time. Prosthodontic treatment is based on the clinical application of the available evidence regarding interocclusal distance (IOD), the positional stability of rest vertical dimension (RVD), and the effect of altering the OVD. Hence, the purpose of this consensus document is to examine available data related to IOD, RVD, and alteration of the OVD. Read More

View Article and Full-Text PDF

Clinical Significance of Horizontal and Vertical Margin of En Bloc Resection for Non-Muscle Invasive Bladder Cancer.

J Urol 2021 Mar 29:101097JU0000000000001735. Epub 2021 Mar 29.

Department of Urology, The Jikei University School of Medicine, Kashiwa, Chiba, Japan.

Purpose: The primary advantage of en bloc resection of bladder tumors (ERBT) is to provide better diagnostic accuracy. However, the clinical significance of horizontal and vertical margin has not been demonstrated. We evaluated the clinical importance of surgical margins in patients who underwent ERBT. Read More

View Article and Full-Text PDF

One hundred marathons in 100 days: Unique biomechanical signature and the evolution of force characteristics and bone density.

J Sport Health Sci 2021 Mar 26. Epub 2021 Mar 26.

Department of Movement and Sports Sciences, Ghent University, Ghent 9000, Belgium.

Background: An extraordinary long-term running performance may benefit from low dynamic loads and a high load-bearing tolerance. An extraordinary runner (age = 55 years, height = 1.81 m, mass = 92 kg) scheduled a marathon a day for 100 consecutive days. Read More

View Article and Full-Text PDF

A comparison of ground reaction force waveforms and step length between recreational endurance runners with hamstring injuries and healthy controls.

Clin Biomech (Bristol, Avon) 2021 Mar 23;84:105334. Epub 2021 Mar 23.

Spaulding National Running Center, Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA, USA.

Background: Acute hamstring injuries during sprinting have been attributed, in part, to the ground reaction forces experienced during early stance. However, no studies have investigated the factors associated with overuse hamstring injuries in endurance runners. Our purpose was to compare early stance ground reaction forces and step length between runners with overuse hamstring injuries and healthy controls. Read More

View Article and Full-Text PDF

Postural Adjustments during Interactions with an Active Partner.

Neuroscience 2021 Mar 25;463:14-29. Epub 2021 Mar 25.

Department of Kinesiology, The Pennsylvania State University, University Park, PA, USA.

Ensuring stability of the human vertical posture is a complex task requiring both anticipatory and compensatory postural strategies when a standing person performs fast actions and interacts with the environment, which can include other persons. How people adjust their preparatory and compensatory postural adjustments in situations when they interact with an active partner is still poorly understood. In this study we investigated the postural adjustments while two healthy persons played a traditional childhood game. Read More

View Article and Full-Text PDF

Safety analysis of early oral feeding after esophagectomy in patients complicated with diabetes.

J Cardiothorac Surg 2021 Mar 26;16(1):56. Epub 2021 Mar 26.

Bengbu Medical College, Bengbu, China.

Objective: To evaluate the safety of early oral feeding in patients with type II diabetes after radical resection of esophageal carcinoma.

Methods: The clinical data of 121 patients with type II diabetes who underwent radical resection of esophageal carcinoma in the department of cardiothoracic surgery of Jinling Hospital from January 2016 to December 2018 were retrospectively analyzed. According to the median time (7 days) of the first oral feeding after surgery, the patients were divided into early oral feeding group (EOF, feeding within 7 days after surgery, 67 cases) and late oral feeding group (LOF, feeding after 7 days, 54 cases). Read More

View Article and Full-Text PDF