1,721,174 research outputs found
Attività fisica e sedentarietà nei giovani. Livelli di attività fisica e sedentarietà nei giovani. Evidenze ed ambiti d’intervento.
No full textLe evidenze scientifiche sui benefici delle attività fisiche per la salute ed il processo formativo dei giovani, sono numerose e sistematicamente confermate attraverso differenti tipologie di studi.
Lo studio sull’attività fisica, con particolare riferimento all’adolescenza, svolta in modo programmato ed organizzato o praticata abitualmente in modo non organizzato, è recente nel nostro Paese, analizzata soprattutto attraverso indagini epidemiologiche, ma ha radici nei Paesi del nord Europa, negli USA, in Canada ed in Australia.
L’analisi delle problematiche inerenti il declino dei livelli di attività fisica tra gli adolescenti e delle caratteristiche delle attività fisiche dei giovani, sono presentate nel seguente articolo attraverso una selezione di studi svolti in diversi Paesi.
Si delineano possibili ambiti di azione nell’educazione fisica e sportiva e nell’ambito delle comunità, allo scopo di integrare ed incrociare i dati di “sorveglianza” con quelli d’intervento sul campo
Enabling Domain Experts to Develop Usable Software Artifacts
No full textEnd-user development techniques are recently becoming a fundamental added value of information systems, since they allow system adaptation to the evolving needs of a company’s users. To adequately manage the life cycle and code quality of software created through end-user development activities, end-user software engineering literature proposes a variety of methods. However, the underlying assumption is that end users carry out end-user development activities to adapt or develop software artifacts for their personal use. For this reason, the usability of the software artifacts resulting from the end user’s work becomes a secondary issue. But, this is not true for multi-tiered proxy design problems, where the usability of software artifacts created by domain experts for other people is instead a fundamental issue. In this paper, we analyze the approaches presented in literature that address this kind of problem, and propose a preliminary solution based on meta-design and meta-modeling
Compiti motori per la riduzione del rischio di infortunio al legamento crociato anteriore per traumi da non contatto negli sport open skill
No full textsi descrivono contenuti e metodologie per la riduzione del rischio di infortunio al legamento crociato anteriore in ambito sportivo, con particolare riferimento agli sport di squadra, tanto a livello professionistico tanto nell'avviamento allo spor
Training aerobico ed effetti sui valori di forza e velocità in giovani calciatori:il problema del concurrent training in età giovanile, I parte
No full textLo stretching statico condiziona le prestazioni di forza, velocità e reattività nel calcio giovanile?
No full textCan the Core Stability Training Influences Sprint and Jump Performances in Young Basketball Players?
No full textThe core is the center of the functional kinetic chain providing the proximal
stability for the distal mobility and function of the limbs. The study aims to
verify the effects of an integrative core stability training on jump and sprint
performance in young basketball players. Young basketball players were involved
in the study (n = 42, 16 female, 26 male) whose age, stature and weight
were respectively (average ± ds) 8.22 ± 0.4 years, 118.2 ± 3.7 cm and 28.8 ±
4.9 kg and was randomly divided in Training Group (TG, n = 24, 10 F, 14 M)
and Control Group (CG, n = 18, 6 F, 12 M). The training program was monitored
for 4 weeks (8 sessions, twice a week and lasting 1 hour each during
the usual sports activity; in addition to the usual technical and sport-specific
exercises, the TG introduced only 4 core stability exercises in the warm-up).
The results revealed a change in test scores across the two time periods for
TG in the left limb Side hop (p < 0.026), in the right limb side hop (p <
0.001), in the left limb 6 meter timed hop (p < 0.0005), in the right limb 6
meter timed hop (p < 0.0005), in the vertical jump (p < 0.002), in the 10 meters
sprint (p < 0.0005) and in the 10 × 5 meters test (p < 0.001). The CG highlighted
differences statistically significant only in the 10 meters sprint (p <
0.05). The study confirms the need to hypothesize in youth sport supplementary
sessions intended for strength training, as the literature has already suggested
for several years
Integrative neuromuscolar and balance training to decrease inter-limb asymmetry values in young soccer players
No full textPurpose: The lower limbs functional asymmetries are determined by
strength deficits between the two limbs(Read et al., 2021). This
asymmetry seems to significantly affect performance but above all it
seems to represent an injury risk factor (Filter et al., 2021; Helme
et al., 2021). The purpose of the study is to analyse and understand the
lower limb asymmetry values in the young soccer players. The study
also verify whether neuromuscular training on unstable and small
surfaces provides an effective plan able to reduce functional asymmetries
and allows the strength performance increase.
Methods: 32 young male soccer players (14.22 ± 0.61 years,
47.66 ± 4.89 kg; 162.3 ± 7.7 cm, age training: 8,3 ± 1,1 years)
have been randomly divided into Experimental Group, EG (n = 15)
and Control Group, CG (n = 17). The EG completed a total of 16
training sessions directed at balance and neuromuscular training on
unstable or small surfaces: two 30-min sessions/week over a 8-week
period. The CG followed an identical training schedule, but training
sessions consisted of soccer- specific drills only. The performances
were assessed in the One-Leg Hop test and Side-Hop test, to quantify
percent asymmetries in lower-limb strength before (T0) and following
(T1) training.
Results: The data analysis returns the highlights significant intergroup
results (T0vsT1): the One-Leg Hop test left limb (p = 0.05,
d = -2,67), the One-Leg Hop asimmetry score (%, p = 0.0005,
d = 10.77), the Side-Hop asymmetry score (%, p = 0.0005, d = 4.25).
Conclusions: The neuromuscular and balance training on small and
unstable surfaces seem to respond effectively to two needs of the
young soccer player: the injury prevention, by reducing the strength
asymmetry values, and increasing the lower limb explosive strength
values
Co-evolution of End-User Developers and Systems in Multi-tiered Proxy Design Problems
No full textThis paper aims at analyzing the category of multi-tiered proxy design problems, where end-user developers do not necessarily coincide with the actual end users of the system, but can be considered as end users’ proxies. This situation can be found in a variety of application domains, from home automation, where electricians defining home automation systems for energy saving are different from house occupants, to e-government, where administrative employees creating e-government services are different from citizens using those services. The analysis leads to the definition of a new interaction and co-evolution model, called ICE2, which, on the basis of the model discussed in a previous work, considers not only the case of end users that directly make their system evolve by means of end-user development activities, but also the case where a proxy figure is present, namely an expert in the application domain that creates and modifies software artifacts for others (the actual end users). Finally, a design approach is proposed, which aims at generalizing the solutions suggested in different application domains, and at sustaining the interaction and co-evolution processes that involve end users, end-user developers, and systems
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