scholarly journals Effects of strength training with variable elastic resistance across the lifespan: a systematic review

2020 ◽  
Vol 15 (44) ◽  
pp. 147-164

The benefits of strength training programs with isotonic free weights or machines have been well-documented in all age groups. However, exercise and healthcare professionals sometime question whether it is possible to obtain the same results with devices of variable resistance, such as elastic bands. To answer this question, the purpose of this systematic review was to identify and summarize the positive effects of elastic resistance exercises used across the lifespan on health outcomes including body composition, functional and performance capacity, and biochemical variables. A secondary aim was to identify common dosage parameters of strength training programs using elastic resistance.

2016 ◽  
Vol 12 (4) ◽  
pp. 1040 ◽  
Author(s):  
Juan A. Marin-Garcia ◽  
Juan Martinez Tomas

Purpose: The AMO framework has been widely accepted in HRM literature for explaining the linkage between human resources practices and performance. However, it remains unclear whether this model has been fully demonstrated or not. Hence, we propose a systematic review that aims at identifying those investigations that have thoroughly tested the model, as well as the approaches used by them.Design/methodology/approach: Systematic literature review, filtering scientific papers published in journals indexed in Scopus, Web of Science or Google Scholar, from the year 1993 to 2016, in the field of Social Sciences and Humanities with research that indirectly apply the AMO model in their analysis.Findings: AMO model is an excellent and structured framework that provides a better understanding of the relationship between HRM and performance. Moreover, the effectiveness of the model's proposal appears to be beyond doubt. In fact, a well trained and skilled employee will perform better, and a motivated worker will be ready to "go the extra mile". Likewise, if the work environment does not provide adequate opportunities, both abilities and motivation might become meaningless. However, we consider that many other factors could influence the positive effects of HPWS. As a matter of fact, not only contextual factors, but also individual beliefs, personal affinities, or personal circumstances (among others) might affect the implementation of these practices and the subsequent outcomes. For this reason, we consider that developing an HRM model that perfectly fit any situation is a very complicated, if not impossible, task.Research limitations/implications: The results show a significant variability in both research approaches and variables taken into consideration. In addition, it seems that little research has been conducted to verify the AMO model directly. Therefore, we consider that there is a great need to study the model from a more systematic perspective. A thorough understanding of the model could lead to a better understanding of the problems that organizations face when implementing human resource practices.Originality/value: Our study shed light on some aspects of the AMO framework within the HRM context. Specifically, we aimed to identify whether or not it is possible to confirm the model as it was originally proposed. We also find out which HR practices and measures of performance were considered across investigations, to define a standard approach.


2014 ◽  
Vol 26 (4) ◽  
pp. 517-523 ◽  
Author(s):  
Andreas Fröberg ◽  
Marie Alricsson ◽  
Jonas Ahnesjö

Abstract Aim: Physical conditioning of youth has always been a controversial topic as it raises ethical, physiological, and medical issues. Current recommendations and guidelines suggest that strength training is a relatively safe and worthwhile method in conditioning youth. This, however, requires well-informed coaches who follow age-appropriate strength training recommendations and guidelines, compiles well-designed strength training programs, and provides qualified supervision and instructions. The purpose of this study was to investigate coaches’ awareness of current recommendations and guidelines regarding strength training for youth. Method: A total of 39 football (US: soccer) coaches (34 males and 5 females) training boys in age groups 8–12 years were included in this study. Data were collected using an attitude statement questionnaire, and the assertions were based upon current recommendations and guidelines. Results: The results revealed significant differences among coaches in terms of knowledge of important aspects of strength training for youth. Conclusions: The results suggested that coaches in the present study were not aware of the latest recommendations and guidelines regarding strength training for youth.


2017 ◽  
Vol 16 (1) ◽  
pp. 107-117 ◽  
Author(s):  
Cecilia Vindrola-Padros ◽  
Rosa Mertnoff ◽  
Cristina Lasmarias ◽  
Xavier Gómez-Batiste

ABSTRACTObjective:The integration of palliative care (PC) education into medical and nursing curricula has been identified as an international priority. PC education has undergone significant development in Latin America, but gaps in the integration of PC courses into undergraduate and postgraduate curricula remain. The aim of our review was to systematically examine the delivery of PC education in Latin America in order to explore the content and method of delivery of current PC programs, identify gaps in the availability of education opportunities, and document common barriers encountered in the course of their implementation.Method:We carried out a systematic review of peer-reviewed academic articles and grey literature. Peer-reviewed articles were obtained from the following databases: CINAHL Plus, Embase, the Web of Science, and Medline. Grey literature was obtained from the following directories: the International Association for Hospice and Palliative Care's Global Directory of Education in Palliative Care, the Worldwide Hospice Palliative Care Alliance's lists of palliative care resources, the Latin American Association for Palliative Care's training resources, and the Latin American Atlas of Palliative Care. The inclusion criteria were that the work: (1) focused on describing PC courses; (2) was aimed at healthcare professionals; and (3) was implemented in Latin America. The PRISMA checklist was employed to guide the reporting of methods and findings.Results:We found 36 programs that were delivered in 8 countries. Most of the programs were composed of interdisciplinary teams, taught at a postgraduate level, focused on pain and symptom management, and utilized classroom-based methods. The tools for evaluating the courses were rarely reported. The main barriers during implementation included: a lack of recognition of the importance of PC education, a lack of funding, and the unavailability of trained teaching staff.Significance of results:Considerable work needs to be done to improve the delivery of PC education programs in Latin American countries. Practice-based methods and exposure to clinical settings should be integrated into ongoing courses to facilitate learning. A regional platform needs to be created to share experiences of successful training programs and foster the development of PC education throughout Latin America.


Retos ◽  
2018 ◽  
pp. 247-251
Author(s):  
Jose Antonio Rodríguez-Gandullo ◽  
Francisco Álvarez-Barbosa

El objetivo del estudio fue investigar los efectos de un entrenamiento de fuerza más una suplementación adicional sobre deportistas adultos no profesionales y vegetarianos. Una revisión sistemática de las bases de datos MEDLINE (PubMed), Scopus, SportDiscus y WOS (Web of Science) fue realizada siguiendo el modelo PICO, utilizando términos que representasen a personas vegetarianas de entre 18 y 64 años que hubiesen realizado una intervención basada en un entrenamiento de fuerza más suplementación. Siguiendo el procedimiento PRISMA, de los 62 estudios encontrados tan solo 3 cumplieron todos los criterios por lo que fueron analizados en su totalidad para poder ser incluidos en la revisión. La calidad metodológica de los estudios se evaluó mediante la escala PEDro. El estudio de Shomrat et al. (2000) la suplementación con creatina provocó un incremento de la masa corporal y potencia media. El estudio de Burke et al. (2003) obtuvo con la suplementación de creatina incrementos en la fosfocreatina (PCr), creatina total (TCr), fuerza, fibras musculares de tipo II y tejido magro, siendo estos cambios más significativos en las personas vegetarianas. Por último, en el estudio de Burke et al. (2008), el factor de crecimiento insulínico de tipo 1 (IGF-1) se incrementó en un 67%, con mayor acumulación en el grupo que fue suplementado con creatina. A raíz de estos resultados se puede concluir que la suplementación con creatina puede provocar efectos positivos en el rendimiento de los deportistas vegetarianos, ya que puede cubrir ciertas carencias derivadas de la dieta vegetariana.Abstract: The aim of the study was to investigate the effects of strength training plus additional supplementation on non-professional adult athletes who are vegetarian. A systematic review of MEDLINE (PubMed), Scopus, SportDiscus, and WOS (Web of Science) databases was performed following the PICO model, using terms related to vegetarians aged between 18 and 64 years who realized an intervention based on strength training and supplementation. Following the PRISMA statement, of the 62 studies found only 3 met all the inclusion criteria and were analyzed entirely to be included in the review. The methodological quality of the studies was performed using the PEDro scale. The study of Shomrat et al. (2000) with creatine supplementation resulted in an increase in body mass and power. The study of Burke et al. (2003), based on creatine supplementation, obtained an increase of phosphocreatine (PCr), total creatine (TCr), strength, type II muscle fibers, and lean tissue. These changes were significant in vegetarians. Finally, in a study of Burke et al. (2008), insulin-like growth factor-1 (IGF-1) increased by 67%, with higher accumulation in the group that was supplemented with creatine. As a consequence of these results we can conclude that creatine supplementation could have positive effects on the performance of vegetarians due to the fact that it could cover certain shortcomings derived from the vegetarian diet.


2021 ◽  
Vol 12 ◽  
Author(s):  
Hans Torvild Kittilsen ◽  
Sannija Goleva-Fjellet ◽  
Baard Ingegerdsson Freberg ◽  
Iver Nicolaisen ◽  
Eva Maria Støa ◽  
...  

PurposeThe present study aimed to investigate the potential impact of age, gender, baseline strength, and selected candidate polymorphisms on maximal strength training (MST) adaptations.MethodsA total of 49 subjects (22 men and 27 women) aged 20–76 years, divided into five age groups, completed an 8 weeks MST intervention. Each MST session consisted of 4 sets with 4 repetitions at ∼85–90% of one-repetition maximum (1RM) intensity in leg-press, three times per week. 1RM was tested pre and post the intervention and blood samples were drawn to genotype candidate polymorphisms ACE I/D (rs1799752), ACTN3 R577X (rs1815739), and PPARGC1A Gly482Ser (rs8192678).ResultsAll age groups increased leg-press 1RM (p < 0.01), with a mean improvement of 24.2 ± 14.0%. There were no differences in improvements between the five age groups or between male and female participants, and there were no non-responders. Baseline strength status did not correlate with 1RM improvements. PPARGC1A rs8192678 T allele carriers had a 15% higher age- and gender corrected baseline 1RM than the CC genotype (p < 0.05). C allele carriers improved 1RM (%) by 34.2% more than homozygotes for the T allele (p < 0.05).ConclusionTo the best of our knowledge, this is the first study to report improvement in leg-press maximal strength regardless of gender, baseline strength status in all age groups. The present study is also first to demonstrate an association between the PPARGC1A rs8192678 and maximal strength and its trainability in a moderately trained cohort. MST may be beneficial for good health and performance of all healthy individuals.


2012 ◽  
Vol 7 (1) ◽  
pp. 2-5 ◽  
Author(s):  
Michael R. McGuigan ◽  
Glenn A. Wright ◽  
Steven J. Fleck

The use of strength training designed to increase underlying strength and power qualities in elite athletes in an attempt to improve athletic performance is commonplace. Although the extent to which strength and power are important to sports performance may vary depending on the activity, the associations between these qualities and performance have been well documented in the literature. The purpose of this review is to provide a brief overview of strength training research to determine if it really helps improve athletic performance. While there is a need for more research with elite athletes to investigate the relationship between strength training and athletic performance, there is sufficient evidence for strength training programs to continue to be an integral part of athletic preparation in team sports.


2021 ◽  
pp. 1-14
Author(s):  
Komanthi Kouloutbani ◽  
Fotini Venetsanou ◽  
Alexandra Markati ◽  
Konstantinos E. Karteroliotis ◽  
Antonios Politis

ABSTRACT Background: The management of neuropsychiatric symptoms (NPS) in patients with dementia is a major challenge. Since no effective therapy has been found to date and drug treatments are associatedwith significant side effects, there seems to be a pressing need for alternative non-pharmacological interventions. Objectives: The current study aims to investigate and compare the effect of different types of physical exercise on the NPS. Methods: A systematic review of the literature was conducted according to the PRISMA guidelines. Five databases (SCOPUS, PubMed, SPORT Discus, Web of science and ScienceDirect) were searched using the appropriate algorithm. What was sought out was randomized control trials (RCTs) that applied physical activity interventions with specific characteristics (type, frequency, intensity, and duration) in patients with dementia or mild cognitive impairment, studied the effect of exercise on their NPS and compared this effect with a control group that did not follow an exercise program. Results: From 512 articles, 13 studies were included in this review, involving a total of 1,925 patients. The results were analyzed and synthesized according to the type of exercise applied – aerobic exercise, multidimensional interventions and muscular strength training programs. In particular, the results showed that repetitive aerobic exercise three to five times a week had a positive effect on NPS, whereas multidimensional interventions combining different types of exercise did not appear to be as effective. Strength training programs have been found to significantly reduce depression symptoms and behavioral problems in demented patients with mobility problems. Conclusions: There is clear evidence that physical activity and especially aerobic exercise may be effective in the management of NPS. However, it is necessary to apply specific practical recommendations and specially designed programs to incorporate physical exercise into the daily routine of these patients.


Author(s):  
Ana Filipa Silva ◽  
Daniele Conte ◽  
Filipe Manuel Clemente

The aim of this systematic review conducted in the topic of youth team-sports players was three-fold: (i) Analyze the variations of decision-making processes between low- and high-level youth players; (ii) analyze the variations of decision-making processes between different age groups; and (iii) analyze the effects of decision-making training-based programs on youth players. Following the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines, this systematic review searched for studies on PubMed, ScienceDirect, Academic Search Complete, SPORTDiscus, and Taylor & Francis Online. The search returned 6215 papers. After screening the records against set criteria, 26 articles were fully reviewed. From the included studies, 9 were focused on comparing the decision-making process between low- and high-level players, 6 compared the decisions made by players from different age categories, and 11 analyzed the effects of decision-making-based training programs on youth players. Comparisons between high- and low-level players suggested that high-level and most talented players present a greater accuracy in the cognitive and executive answers to the game as well as being more adjustable to more complex situations. Considering the comparisons between age groups, a tendency of older players to execute more accurate decisions in the game and to have better tactical knowledge and behavior was observed. Finally, the effects of decision-making training programs suggest a beneficial effect employing practical scenarios (mainly based on small-sided and conditioned games), primarily improving passing decisions and execution. However, the benefits of interventions using videos are not clear.


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