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PubMed Journal Database | Scandinavian journal of medicine & science in sports RSS

04:01 EDT 22nd March 2019 | BioPortfolio

The US National Library of Medicine and National Institutes of Health manage PubMed.gov which comprises of more than 29 million records, papers, reports for biomedical literature, including MEDLINE, life science and medical journals, articles, reviews, reports and  books.

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Showing PubMed Articles 1–25 of 245 from Scandinavian journal of medicine & science in sports

Sustained submaximal contraction yields biphasic modulation of soleus post activation depression in healthy humans.

The amplitude of the H-reflex during the development and progression of fatigue reflects a complex interplay between central and peripheral factors. The purpose of this study is to characterize H-reflex homosynaptic post-activation depression (PAD) in an on-line fashion during a sustained submaximal fatigue task. The task required a high motor output in order to increase the likelihood of creating partial muscle ischemia with accumulation of fatigue metabolites, an important potential inhibitory influence u...

Self-regulatory skills: are they helpful in the prevention of overuse injuries in talented tennis players?

Talented athletes use metacognitive skills to improve their performance. Also, it is known that these skills are important for managing one's health. The goal of this study was to identify the relationship between metacognitive skills and overuse injuries in talented tennis players. Metacognitive skills were measured in 73 talented tennis players (45 boys and 28 girls, age 11 to 14) at the start of the season, using the Self-Regulation of Learning Self-Report Scale. Overuse injuries were monitored for one s...

Phase angle is associated with the physical fitness of HIV-infected children and adolescents.

The objective of this study was to identify the association of phase angle with physical fitness in children and adolescents infected with HIV. Sixty-four children and adolescents infected with HIV (8 to 15 years old) were tested for vertical transmission. The electrical bioimpedance was used to obtain the phase angle. Body fat (BF) and lean soft tissue mass (LSTM) were measured by X-ray absorptiometry and the manual grip strength was evaluated by dynamometry. The peak oxygen consumption (VO 2 peak) was mea...

Sports participation is inversely associated with C-reactive protein levels in adolescents: ABCD Growth Study.

To analyze the relationship between sports participation and C-reactive protein (CRP) levels in adolescents, and to identify the possible role of mediation developed by trunk fatness (TF).

Left atrial volume in elite athletes: A meta-analysis of echocardiographic studies.

Information on left atrium (LA) enlargement, as assessed by LA volume (LAV) instead of LA diameter, in the athletic population is scanty. To expand current knowledge on this issue we performed an up-dated meta-analysis of echocardiographic studies.

Concurrent exercise training on hiperglicaemia and comorbidities associated: non-responders using clinical cutoff points.

This study examined the effects of a 20-week concurrent training (CT, i.e., resistance plus endurance training) intervention on cardiovascular risk factors such as body composition, blood pressure and lipid profile among adult women with hyperglycemia. A secondary aim was to report prevalence of non-responders for the different study outcomes. Physically inactive overweight/obese and hyperglycemic adult women (42 ± 6 years; BMI = 30.9 ± 4.8 kg/m ) were randomly assigned to a 20-week CT intervention group ...

Motor competence, perceived physical competence, physical fitness, and physical activity within Finnish children.

The purpose of this study was to investigate reciprocal relationships among students' motor competence (MC) (leaping, throwing, catching, jumping skills), perceived physical competence, health-related fitness (HRF) (20 m. shuttle run, push-up, abdominal muscles endurance tests) and objectively measured moderate-to-vigorous physical activity (MVPA). Participants included 422 Grade 5 Finnish children (246 girls). Two separate structural equation models investigated paths 1) from MC through both perceived phys...

Muscle activity and vibration transmissibility during whole-body vibration in chronic stroke.

This study aimed to investigate the influence of whole-body vibration (WBV) frequency, amplitude and body posture on lower limb muscle activation among people with chronic stroke, and whether the EMG response to vibration stimulus differed between paretic and non-paretic side. The relationship between muscle activation and WBV transmission was examined.

Assessing the psychosocial factors associated with adherence to exercise referral schemes: a systematic review.

This paper aimed to systematically review the evidence base to uncover the key psychosocial factors that underpin adherence to an exercise referral scheme (ERS). Databases PsycINFO, MEDLINE, SPORTDiscus, Web of Science, PubMed, PsycARTICLES, Open Grey, and PsycEXTRA were systematically searched. A parallel results-based convergent synthesis was performed by identifying key themes from quantitative and qualitative studies separately. After applying inclusion and exclusion criteria, the review included 24 eli...

Similar relative decline in aerobic and anaerobic power with age in endurance and power master athletes of both sexes.

Lower physical activity levels in old age are thought to contribute to the age-related decline in peak aerobic and anaerobic power. Master athletes maintain high levels of physical activity with advancing age and endurance or power training may influence the extent to which these physical functions decline with advancing age. To investigate, 37-90-year-old power (n=20, 45% female) and endurance (n=19, 58% female) master athletes were recruited. Maximal aerobic power was assessed when cycling two-legged (VO ...

Shoulder and thorax kinematics contribute to increased power output of competitive handcyclists.

Current knowledge on recumbent handbike configuration and handcycling technique is limited. The purpose of this study was to evaluate and compare the upper limb kinematics and handbike configurations of recreational and competitive recumbent handcyclists, during sport specific intensities. Thirteen handcyclists were divided into two significantly different groups based on peak aerobic power output (PO ) and race experience; competitive (n=7; 5 H3 and 2 H4 classes; PO : 247±20W) and recreational (n=6; 4 H3 ...

Effectiveness of a Physical Activity Intervention in Preschoolers: A Cluster-Randomized Controlled Trial.

Several activity interventions in preschool settings exist, but little attention has been paid to effects on hemodynamic factors. The study aimed to assess the effectiveness of an exercise program on health-related outcomes including blood pressure (BP) and markers of vascular function in preschoolers, with focus on socioeconomic background. A cluster-randomized controlled trial, with preschool as unit of randomization and children as unit of analysis. Preschools with 3-to 6-yr-old children, stratified by s...

Mild hypohydration impairs cycle ergometry performance in the heat: A blinded study.

The aim of the present study was to observe the effect of mild hypohydration on exercise performance with subjects blinded to their hydration status. Eleven male cyclists (weight 75.8±6.4 kg, VO : 64.9±5.6 mL·kg ·min , body fat: 12.0±5.8%, Power : 409±40 W) performed three sets of criterium-like cycling, consisting of 20-min steady-state cycling (50% peak power output), each followed by a 5-km time-trial at 3% grade. Following a familiarization trial subjects completed the experimental trials, in coun...

The team effect on doping in professional male road cycling (2005-2016).

This article questions organizations' (clubs, teams, etc.) responsibility in doping use from the case of anti-doping rules violations (ADRVs) sanctioned by the Union Cycliste Internationale in professional cycling. We built a database with 271 caught riders among 10551 professional riders employed from 2005 to 2016 in the three first world divisions. We developed a time-discrete event history model with a multilevel perspective to consider if the ADRV is related to the characteristic of a rider's career pat...

The Role of Pre-Diagnostic Data in Injury Epidemiology in Pre-professional Dancers.

Pre-professional dance training starts at very early ages, on a highly demanding environment placing students at significant risk for injury. Injury management and prevention are a matter of concern. Given the constant interchangeability of risk factors, identifying injury patterns may prove to be equally as important. Data looking back from the time of injury through context-specific approaches, are missing.

Razor hamstring curl and Nordic hamstring exercise architectural adaptations: impact of exercise selection and intensity.

To investigate knee flexor strength and biceps femoris long head (BFlh) architectural adaptations following two different Nordic hamstring exercise (NHE) interventions and one razor hamstring curl (RHC) intervention.

Comparison of gluteus medius and minimus activity during gait in people with hip osteoarthritis and matched controls.

The gluteal muscles act as stabilisers of the hip joint and are important for the maintenance of hip function. Atrophy and weakness of the gluteal muscles has been identified in people with hip OA, but it is not known whether these muscles also exhibit altered activity patterns. The aim of this study was to compare gluteal muscle activity in people with hip OA and healthy older adults. Fine wire intramuscular electrodes were inserted into the three segments of gluteus medius (GMed) and two segments of glute...

Detraining effect on overweight/obese women after high-intensity interval training in hypoxia.

Promising benefits on fat mass and biochemical components may be reported after applying programs of cyclic hypoxia and HIIT.

Development of physical fitness performance in young Swiss men from 2006 to 2015.

From 1980 to 2000, physical fitness decreased and body mass index (BMI) increased in the population of many industrialised countries. Little is known about these trends after the year 2000. The present study aimed to investigate physical fitness performance, physical activity (PA) behaviour and BMI of young, male Swiss adults between 2006 and 2015. For this purpose, results from the Swiss Armed Forces mandatory recruitment were used. 306,746 male conscripts provided complete fitness test data, mean±SD (ran...

Isometric training and long-term adaptations; effects of muscle length, intensity and intent: A systematic review.

Isometric training is used in the rehabilitation and physical preparation of athletes, special populations and the general public. However, little consensus exists regarding training guidelines for a variety of desired outcomes. Understanding the adaptive response to specific loading parameters would be of benefit to practitioners. The objective of this systematic review, therefore, was to detail the medium to long-term adaptations of different types of isometric training on morphological, neurological and ...

Cytokine, glycemic and insulinemic responses to an acute bout of games-based activity in adolescents.

An acute bout of endurance exercise in adults stimulates a same-day anti-inflammatory response which may affect low-grade chronic inflammation and insulin resistance and benefit cardio-metabolic health. The anti-inflammatory responses to intermittent games-based exercise and to exercise in young people beyond 2-h post-exercise are unknown. Thus, the purpose of the present study is to examine the anti-inflammatory, glycemic and insulinemic response to games-based activity in adolescents. Following ethical ap...

Effects of oral curcumin ingested before or after eccentric exercise on markers of muscle damage and inflammation.

We examined the effect of curcumin (CUR) ingestion before or after exercise on changes in muscle damage and inflammatory responses after exercise. We conducted two parallel experiments with different CUR ingestion timings using a double-blind crossover. In Exp. 1, ten healthy men ingested 180 mg∙day of CUR or placebo (PLA) 7 days before exercise. In Exp. 2, ten other healthy men ingested 180 mg∙day of CUR or PLA 7 days after exercise. They performed 30 maximal isokinetic (120°∙s ) eccentric contracti...

Neurovascular structures in human vastus lateralis muscle and the ideal biopsy site.

A density model of neurovascular structures was generated from 28 human vastus lateralis muscles isolated from embalmed cadavers. The intramuscular portion of arteries, veins and nerves was dissected, traced on transparencies and digitised before adjustment to an average muscle shape using Procrustes analysis to generate density distributions for the relative positions of these structures. The course of arteries, veins and nerves was highly variable between individual muscles. Nevertheless, a zone of lower ...

Variable, but not free-weight, resistance back squat exercise potentiates jump performance following a comprehensive task-specific warm-up.

Studies examining acute, high-speed movement performance enhancement following intense muscular contractions (frequently called 'post-activation potentiation'; PAP) often impose a limited warm-up, compromizing external validity. In the present study the effects on countermovement vertical jump (CMJ) performance of back squat exercises performed with or without elastic bands during warm-up were compared. After familiarization, fifteen active men visited the laboratory on two occasions under randomized, count...

A method to standardize the blood flow restriction pressure by an elastic cuff.

Blood flow restriction training using a practical (non-pneumatic) elastic-cuff has recently increased in popularity. However, a criticism of this method is that the pressure applied and the amount of blood flow restriction induced is unknown. The aim was to quantify blood flow following the application of an elastic-cuff and compare that to what is observed using a more traditional pressurized nylon-cuff. Thirty-five young participants (16 men and 19 women) visited the laboratory once for testing. In a rand...


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