scholarly journals Maximal Strength, Sprint, and Jump Performance in High-Level Female Football Players Are Maintained With a Customized Training Program During the COVID-19 Lockdown

2021 ◽  
Vol 12 ◽  
Author(s):  
Sigurd Pedersen ◽  
Dag Johansen ◽  
Andrea Casolo ◽  
Morten B. Randers ◽  
Edvard H. Sagelv ◽  
...  
Keyword(s):  
Training Program ◽  
Control Level ◽  
Force Production ◽  
Football Players ◽  
Jump Performance ◽  
Training Time ◽  
Sprint Time ◽  
Customized Training ◽  
Home Based ◽  
High Level

IntroductionThe COVID-19 outbreak with partial lockdown has inevitably led to an alteration in training routines for football players worldwide. Thus, coaches had to face with the novel challenge of minimizing the potential decline in fitness during this period of training disruption.MethodsIn this observational pre- to posttest study involving Norwegian female football players (18.8 ± 1.9 years, height 1.68 ± 0.4 m, mass 61.3 ± 3.7 kg), we investigated the effects of a prescribed home-based and group-based intervention, implemented during the COVID-19 lockdown, on maximal muscular force production and high velocity variables. Specifically, maximal partial squat strength one repetition maximum (1RM), counter movement jump (CMJ) and 15 m sprint time were assessed 1 week prior to the lockdown and 12 weeks after the onset of lockdown. We also collected training content and volume from the prescribed training program and self-reported perceived training quality and motivation toward training.ResultsWe observed no change in 1RM [pretest: 104 ± 12 kg, posttest: 101 ± 11 kg (P = 0.28)], CMJ height [pretest: 28.1 ± 2.3 cm, posttest: 26.8 ± 1.9 (P = 0.09)], and 15 m sprint time [pretest: 2.60 ± 0.08 s, posttest: 2.61 ± 0.07 s (P = 0.52)].ConclusionOur findings suggest that a prescribed home-based and group-based intervention with increased training time devoted to strength, jump, and sprint ability, and regulated to obtain a sufficient infection control level is feasible and effective to preserve strength, jumping, and sprinting abilities of high-level female football players during a ∼ 3-month period of a pandemic-induced lockdown.

scholarly journals The effects of supplementary plyometric training on the development of selected motor skills of young football players from Akademia Raków Częstochowa football club

2021 ◽  
Vol 4 (1) ◽  
pp. 129-138
Author(s):  
Marta Szymanek-Pilarczyk
Keyword(s):  
Motor Skills ◽  
Football Players ◽  
Plyometric Training ◽  
Short Term ◽  
Football Club ◽  
Sprint Time ◽  
Long Jump ◽  
Run Up ◽  
High Level ◽  
Football Training

Contemporary football requires from players a high level of fitness and efficiency on the pitch. Match statistics display an increased number of short-term movements of high intensity. Due to the changes in the nature of this sports discipline, optimal proportions of shaping motor parameters in football training are sought for.The aim of the research was to learn how plyometric training influences better results in long jump and decreased sprint time for the distance of 5m in a selected group of young players from Akademia Raków Częstochowa football club.24 football players from Akademia Raków Częstochowa football club, aged 16–18, were subject of the research.After using plyometric training, there were statistically relevant better results obtained, both in long jump (p < 0.001) and in a 5m sprint (p < 0.001). One could also notice negative correlation between the jump length and 5m sprint time. The obtained result was statistically relevant (p < 0.001).The use of a selected set of plyometric exercises in supplementary football training in Akademia Raków Częstochowa football club led to better results in long jump without a run-up and shortened 5 m distance sprint time. The results were observed already after 8 weeks of training.

scholarly journals Train Fast While Reducing False Positives: Improving Animal Classification Performance Using Convolutional Neural Networks

Geomatics ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 34-49
Author(s):  
Mael Moreni ◽  
Jerome Theau ◽  
Samuel Foucher
Keyword(s):  
False Positive ◽  
Classification Performance ◽  
Large Datasets ◽  
False Positives ◽  
Fine Tuning ◽  
Training Time ◽  
In The Wild ◽  
Test Sets ◽  
High Level ◽  
Time Decrease

The combination of unmanned aerial vehicles (UAV) with deep learning models has the capacity to replace manned aircrafts for wildlife surveys. However, the scarcity of animals in the wild often leads to highly unbalanced, large datasets for which even a good detection method can return a large amount of false detections. Our objectives in this paper were to design a training method that would reduce training time, decrease the number of false positives and alleviate the fine-tuning effort of an image classifier in a context of animal surveys. We acquired two highly unbalanced datasets of deer images with a UAV and trained a Resnet-18 classifier using hard-negative mining and a series of recent techniques. Our method achieved sub-decimal false positive rates on two test sets (1 false positive per 19,162 and 213,312 negatives respectively), while training on small but relevant fractions of the data. The resulting training times were therefore significantly shorter than they would have been using the whole datasets. This high level of efficiency was achieved with little tuning effort and using simple techniques. We believe this parsimonious approach to dealing with highly unbalanced, large datasets could be particularly useful to projects with either limited resources or extremely large datasets.

Roller Massage Prior to Running Does Not Affect Gait Mechanics in Well-Trained Runners

2021 ◽  
pp. 1-9
Author(s):  
Jessica G. Hunter ◽  
Gina L. Garcia ◽  
Sushant M. Ranadive ◽  
Jae Kun Shim ◽  
Ross H. Miller
Keyword(s):  
Repeated Measures ◽  
Reaction Force ◽  
Force Production ◽  
Endurance Athletes ◽  
Jump Height ◽  
Jump Performance ◽  
Average Load ◽  
Load Rate ◽  
Free Moment ◽  
Muscle Force Production

Context: Understanding if roller massage prior to a run can mitigate fatigue-related decrements in muscle force production during prolonged running is important because of the association between fatigue and running-related injury. Objective: The authors investigated whether a bout of roller massage prior to running would (1) mitigate fatigue-related increases in vertical average load rate and free moment of the ground reaction force of running and (2) mitigate decreases in maximal countermovement jump height. Design: Repeated-measures study. Setting: Laboratory. Participants: A total of 14 recreational endurance athletes (11 men and 3 women) volunteered for the study. Interventions: A 12.5-minute foam roller protocol for the lower extremities and a fatiguing 30-minute treadmill run. Main Outcome Measures: Vertical average load rate, free moment, and maximal jump height before (PRE) and after (POST) the fatiguing treadmill run on separate experimental days: once where participants sat quietly prior to the fatiguing run (REST) and another where the foam roller protocol was performed prior to the run (ROLL). Results: A 2-way multiple analysis of variance found no significant differences in vertical average load rate, free moment, and jump height between PRE/POST times in both REST/ROLL conditions. Conclusions: The authors concluded that recreational endurance athletes maintain running mechanics and jump performance after a fatiguing run regardless of prerun roller massage and may not rely on prerun roller massage as a form of injury prevention.

Effectiveness of a 6-month home-based training program in Prader-Willi patients

2010 ◽  
Vol 31 (6) ◽  
pp. 1373-1379 ◽  
Author(s):  
Luca Vismara ◽  
Veronica Cimolin ◽  
Graziano Grugni ◽  
Manuela Galli ◽  
Cinzia Parisio ◽  
...  
Keyword(s):  
Training Program ◽  
Home Based

scholarly journals Social Cognition in Rehabilitation Context: Different Evolution of Affective and Cognitive Theory of Mind in Mild Cognitive Impairment

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Federica Rossetto ◽  
Francesca Baglio ◽  
Davide Massaro ◽  
Margherita Alberoni ◽  
Raffaello Nemni ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Social Skills ◽  
Mild Cognitive Impairment ◽  
Theory Of Mind ◽  
Cognitive Theory ◽  
Term Effect ◽  
Home Based ◽  
Long Term Effect ◽  
High Level

Maintaining social skills such as Theory of Mind (ToM) competences is important to counteract the conversion into dementia in Mild Cognitive Impairment (MCI). Multidimensional nonpharmacological interventions demonstrated their potential in improving cognitive and behavioral abilities; however, little is known about the long-term effect of such interventions on social skills in people with MCI. The aim of this longitudinal study was to monitor ToM competences considering both cognitive and affective domains in an amnestic MCI (aMCI) sample involved in a home-based multistimulation treatment (MST@H). 30 aMCI subjects (M:F=15:15; mean age±SD=77.00±4.60) were enrolled, and three steps of evaluation with neuropsychological tests and ToM tasks have been implemented. 21 healthy controls (HC) were also included (M:F=9:12; mean age±SD=74.95±3.88) to characterize the aMCI sample regarding differences in ToM performance compared to HC at the baseline evaluation. Our results show that the aMCI group statistically significantly underperformed the HC group only in the advanced ToM tasks, confirming an initial decline of high-level ToM competences in this population. The longitudinal evaluation revealed time changes not only in some subcognitive domains of MoCA (memory and executive functions) but also in cognitive and affective ToM dimensions in aMCI subjects. Our findings suggest that cognitive and affective ToM can be considered useful outcome measures to test the long-term effect of treatment over time.

scholarly journals The effect of including the Nordic Hamstring exercise on sprint and jump performance in athletes: protocol of a systematic review and meta-analyses

2020 ◽  
Author(s):  
Kasper Krommes ◽  
Mathias F. Nielsen ◽  
Laura Krohn ◽  
Birk M. Grønfeldt ◽  
Kristian Thorborg ◽  
...  
Keyword(s):  
Systematic Review ◽  
High Speed ◽  
Data Extraction ◽  
Force Production ◽  
List Type ◽  
Jump Performance ◽  
Production Studies ◽  
Hamstring Strain ◽  
Data Extraction Form ◽  
Meta Analyses

AbstractThe Nordic Hamstring exercise reduces hamstring strain injuries in football and other sports, but the exercise is not well adopted in practice. Barriers from practitioners include fear of performance decrements, due to lack of specificity of the exercise with high speed running. However, in theory, increased eccentric hamstring strength could transfer to faster sprinting due to higher horizontal force production. Studies on the effect of the Nordic Hamstring exercise on performance have been conflicting and no synthesis of the evidence exists. We therefore pose the following question: does including the Nordic Hamstring exercise hamper sprint or jump performance in athletes? We will answer this question by performing a systematic review of the literature, critically appraise relevant studies, and GRADE the evidence across key outcomes and perform meta-analyses, meta-regression and subgroup analyses. In this protocol we outline the planned methods and procedures.Progress reportBesides this protocol, our data extraction form and the process of data extraction has been piloted on 3 relevant studies, along with familiarization with the Risk of Bias 2.0 tool. We have also comprised a preliminary search strategy for PubMed.Supplementary filesData Extraction Form (.pdf)Populated PRISMA-P checklist (.pdf)

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