Rafał Stemplewski

• PhD
• Professor (Assistant) at Akademia Wychowania Fizycznego im. Eugeniusza Piaseckiego w Poznaniu

UNSTRUCTURED Technology-assisted physical activity interventions for older adults in their home-based environment have been used to promote physical activity. While previous reviews focused on health-related outcomes of such interventions, this scoping review explores the characteristics of the technology in relation to the characteristics of popul...

This study aims to compare physical activity levels, esports-specific reaction times, self-evaluated health, and injuries between non-professional esports players (EPs) and non-players (NPs). Participants were healthy, with an average age of 22.7 ± 2.49 years and BMI of 25.5 ± 4.95 kg/m2. Physical activity was quantified using the Baecke Questionna...

Background: In the aging society, more attention is paid to the promotion of forms of physical activity that can improve postural stability and cognitive functioning. In this context, the importance of combined exercises, requiring simultaneous physical and cognitive involvement, is emphasized. Juggling seems to be a form of activity that is both c...

Technology-assisted physical activity interventions for older adults in their home-based environment have been used to promote physical activity. While previous studies and reviews focused on health-related outcomes of such interventions, this scoping review focuses on the technology used and aims to map its feasibility and acceptability. We identi...

Background Caffeine (CAF) ingestion improves performance in a broad range of exercise tasks. Nevertheless, the CAF-induced, dose-dependent effect on discipline-specific performance and cognitive functions in CrossFit/High-Intensity Functional Training (HIFT) has not been sufficiently investigated. The aim of this study was to evaluate the effect of...

Pectus excavatum is the most encountered of chest wall deformities. It may produce respiratory and cardiovascular symptoms, hence surgical repair of this defect is performed. The procedure involving the insertion of metal bars under the sternum (the Nuss procedure) usually brings significant improvement to patients. However, the effect of the repai...

The study aimed to evaluate the effect of sleep deprivation on postural stability among physically active young adults. The study involved 22 physical education students. Average velocities and spatial distribution of the center of pressure displacements were taken as indicators of postural stability (double and one-leg standing). Two-way ANOVA wit...

The open-water training conditions in sailing sports limit the coach’s ability to provide instructions. Auditory feedback provided using a smartphone application in real-time seems to be a promising tool in the training process. The aim of the study was to assess the usefulness of a smartphone application created to support tactical decisions via a...

Deterioration of the structure and function of the musculoskeletal system represents a significant problem during aging and intervention with a suitable load of physical activity may improve the quality of life. Nordic walking (NW) has become a popular and easily accessible form of activity, especially for older adults people around the world. Thus...

Background: Regular and individualised physical activities have been shown to prevent adverse changes associated with the aging process. The main purpose of this study was to evaluate changes in carbohydrate and lipid metabolism and white blood cell (WBC) subpopulations in postmenopausal women participating in Nordic walking (NW) training and to c...

This systematic review formulated a research question based on the PICO method in accordance with the Guidelines for Systematic Reviews and Meta-Analyses (PRISMA), "What is the effect of juggling as dual-task activity on neuroplasticity in the human brain?" In total, 1982 studies were analysed, 11 of which met the inclusion criteria and were includ...

Decreased postural stability is observed in older adults. There is an increased risk of falls, which may lead to serious complications and death. Elderly people can maintain and even improve their postural stability through properly selected exercises. This study investigated the effect of exercise using the Emil Jaques–Dalcroze’s Eurhythmics (JDE)...

The aim of this study was to assess the changes in the balance of healthy, elderly women as a result of Nordic walking training using of two types of poles: classic poles, and poles with an integrated resistance shock absorber. Thirty-four women completed the experiment (Age = 66.8 ± 4.1 years). They were randomly assigned into the experimental gro...

Thus far, the differences in effect of auditory or visual feedback in motor learning have presented results derived from mixed groups and sex differences have not been considered. However, perception and processing of auditory stimuli and performance of visual motor tasks appear to be sex-related. The purpose of this study was to investigate the le...

Background: Progressive degenerative changes in the body of elderly people lead to a decrease in physical and mental fitness. Seniors have a problem with performing tasks that involve both physical and mental health at the same time. The risk of falls increases, the consequences of which in old age may be particularly dangerous. It was decided to...

The aim of the study was to assess the impact of proprioceptive training with the use of virtual reality (VR) on the level of postural stability of high–altitude workers. Twenty-one men working at height were randomly assigned to the experimental group (EG) with training (n = 10) and control group (CG) without training (n = 11). Path length of the...

The smartphone has recently become a commonly used tool for satellite navigation. The reliability of built-in smartphone Global Navigation Satellite Systems receivers was analyzed in terms of distance, velocity/speed and acceleration, but little is known about the accuracy of angular change-of-direction measurements. This might be important in the...

Inadequate levels of physical activity among older people lead to a gradual decline in self-reliance and consequent dependence on other people. The aim of the study was to evaluate the impact of Nordic walking training with poles with an integrated resistance shock absorber on the functional fitness of older women. Forty-two women (Mage = 64.7 ± 3....

The purpose of the study was to analyze the level of postural stability and physical activity of at-height workers. The study included 34 healthy men aged 25–43. Two groups were identified based on the type of work they performed: at-height workers (HW) (n = 17), and office workers (OW) (n = 17). Physical activity, including physical activity at wo...

The links between increased participation in Physical Activity (PA) and improvements in health are well established. As this body of evidence has grown, so too has the search for measures of PA with high levels of methodological effectiveness (i.e. validity, reliability and responsiveness to change). The aim of this “review of reviews” was to provi...

The links between increased participation in Physical Activity (PA) and improvements in health are well established. As this body of evidence has grown, so too has the search for measures of PA with high levels of methodological effectiveness (i.e. validity, reliability and responsiveness to change). The aim of this “review of reviews” was to provi...

Introduction: Early diagnosis of postural control deficiencies facilitates implementation of an individual rehabilitation plan to prevent falls. The aim of the study was to assess the risk of falling in individuals with visual impairments, and to compare performance-based and theoretical limits of stability in subjects with various risks of falling...

Back pain is a frequent symptom in the obese. The purpose of the study was to compare the effects of two training programs on the reduction of back pain among obese women. The study included 30 obese women who reported back pain within 3 months preceding enrollment. The subjects were randomly allocated to endurance or endurance/resistance physical...

The aim of this study was to assess the effect of physical exercise on postural stability of individuals who are visually impaired and sighted participants, adjusted for potential modulatory effect of physical activity level and BMI. The study included 23 participants who were severely visually impaired and 23 sighted participants. Postural stabili...

Purpose The study examined whether increased levels of habitual physical activity (HPA) in men over 60, expressed by the volume of energy expenditure in relation to PA, is significantly related to a higher self-assessment of functional fitness, selfdependency fitness and health. Methods One hundred and sixty six men over 60 (60–88 years of age) li...

The aim of the study was to compare the effect of exercise on postural control (PC) among the elderly with lower or higher level of habitual physical activity (HPA). The study involved 17 elderly men (mean age 72.9 ± 4.79 years). Mean velocity of the center of pressure (COP) displacements was measured using a force plate both before and after cycle...

The aim of this study was to assess the changes in the postural control (PC) during quiet stance among elderly men with fatigue induced by moderate exercise, and to assess the relationships between changes in PC and somatic indices (body mass index (BMI), waist to hip ratio (WHR)), load during exercise, and post-exercise blood lactate (BL) concentr...

The aim of the study was to evaluate intra- and intersession test-retest reliability for the measurements of centre of pressure displacement in quiet standing and during maximal voluntary body leaning (approximate area of stability limits). 27 elderly men participated in the study (71.4±4.9 of age). Intrasession (4 measurements with two-minute brea...

The aim of the study was to assess the effects of SPB on a range of postural stability changes occurring after moderate exercise in elderly people. Twenty-seven males from the age of 65-81 years old (mean 71.6±4.9 years) took part in the study. The postural stability during bipedal quiet standing was tested directly before and after 10-min of exerc...

The purpose of this study was to assess the effect of 18-week Tai Chi training on body balance in dynamic trial among elderly men. The study covered 49 subjects from age 60 to 82.1 years, who had osteopenia or osteoporosis. The subjects were recruited from the community by direct mailings and community efforts to participate in studies. The partici...

The aim of the study was to check whether there are any differences in the level of body balance between younger and elderly men. Body balance was measurements by computer posturographic system in two variants, i.e. a) with open eyes, b) with closed eyes. The measurement of the body balance was used also for analysis importance of the sight organ f...

Purpose. The aim of the study was to evaluate relations between habitual physical activity and BMI, WHR and body composition in 65-year-old and elder men. Basic procedures. 137 elderly men (mean age 72.8 ± 5.51 years) participated in the study. Height, weight, waist and hip circumferences were measured to calculate BMI and WHR indices. The Caltrac...

The purpose of the present study was to examine the serum levels of bone turnover markers and interleukin 1beta in healthy elderly men with different levels of habitual physical activity. The study was conducted on 40 healthy men aged between 65 and 85 years (mean 74.0 +/- 7.55 years). The study population was divided into two groups with respect t...

It is well documented that regular physical activity and increased levels of melatonin may enhance the blood antioxidant system. The aim of the present study was to evaluate the antioxidant defense mechanisms, in particular, the antioxidant potential of melatonin in groups of elderly men (mean age 70 years), marked of on the basis of habitual physi...

Increased glucose metabolism through the hexosamine biosynthesis pathway has been shown to mediate many of adverse effects i.e. desensitisation of glucose transport in tissues, an inhibition of glycolysis and glycogen synthesis in skeletal muscles, an impairment of insulin secretion in pancreatic islet cells, arteriosclerosis and nephropathy by sti...