Search results for "Squat"

Association between frontal plane knee control and lower extremity injuries : a prospective study on young team sport athletes

2017

Background/aimPoor frontal plane knee control can manifest as increased dynamic knee valgus during athletic tasks. The purpose of this study was to investigate the association between frontal plane knee control and the risk of acute lower extremity injuries. In addition, we wanted to study if the single-leg squat (SLS) test can be used as a screening tool to identify athletes with an increased injury risk.MethodsA total of 306 basketball and floorball players participated in the baseline SLS test and a 12-month injury registration follow-up. Acute lower extremity time-loss injuries were registered. Frontal plane knee projection angles (FPKPA) during the SLS were calculated using a two-dimen…

Directly Observed Physical Activity and Fundamental Motor Skills in Four-Year-Old Children in Day Care

2016

Physical activity (PA), its location, social interactions and fundamental motor skills (FMS) were investigated in four-year-old Finnish children in day care. Six skills in the stability, locomotor and manipulative domains were assessed in 53 children (24 boys, 29 girls, normal anthropometry) with the APM-Inventory manual for assessing children’s perceptual and FMS and Total Motor Scores (TMS; 0–6 points) calculated. PA intensity, location, group composition and activity type − sitting, squatting, kneeling − were directly observed with a modified version of the Observational System for Recording Physical Activity in Children – Preschool Version (OSRAC – P) during three consecutive days in 14…

Effects of internal kinetics and muscle activity during the wide and narrow barbell back squat

2017

Lahti, J. 2017. Effects of internal kinetics and muscle activity during the wide and narrow barbell back squat. Sports biology department, University of Jyväskylä. Master’s thesis. p. 102 (4 attachments). Introduction. The barbell back squat (BBS) is a commonly utilized strength exercise to support general preparedness for the demands in multiple sports. Recently, studies have shown various strength training exercises have the potential to recruit the regions of the hamstrings differently. Specifically, it is unknown if changing stance width under conditions where forward knee movement is restricted engages the hamstring regions differently and how this corresponds with measured 3-D net joi…

CONFLICTING CITIZENSHIP AND (RE)ACTIVE ZONES IN THE URBAN AREAS: CONFRONTING THE CASE OF BERLIN AND ROME

In tempi di crisi, la voglia di immaginare un futuro migliore e diverso prende il sopravvento. A partire dagli sconvolgimenti politici e sociali del '68 passando attraverso le crisi sistemiche del 1970 e ad ogni crisi da allora, le città europee hanno assistito a fenomeni di "riappropriazione" di spazi fisici urbani che sono stati sperimentati da movimenti sociali e volontariamente appropriati poi come pratiche dal basso dagli abitanti delle citta` che hanno utilizzanto la "occupazione" come una tattica legittima di protesta. Le pratiche di riappropriazione, sono state inoltre messe in pratica dalla cittadinanza insorgente, negli ultimi decenni, per resistere alla crisi dello stato sociale …

Transcranial Alternating Current Stimulation (tACS) Does Not Affect Sports People’s Explosive Power: A Pilot Study

2021

Purpose: This study is aimed to preliminary investigate whether transcranial alternating current stimulation (tACS) could affect explosive power considering genetic background in sport subjects.Methods: Seventeen healthy sports volunteers with at least 3 years of sports activities participated in the experiment. After 2 weeks of familiarization performed without any stimulation, each participant received either 50 Hz-tACS or sham-tACS. Before and after stimulation, subjects performed the following tests: (1) the squat jump with the hands on the hips (SJ); (2) countermovement jump with the hands on the hips (CMJ); (3) countermovement jump with arm swing (CMJ-AS); (4) 15-s Bosco’s test; (5) s…

Biomechanical comparison between sprint start, sled-pulling and selected squat type exercises

2012

The purpose of the present study was to compare kinetics, kinematics and muscle activity between sprint start, sled-pulling and selected squat type exercises and also to examine how different exercises and variables correlate with the performance time of the block start (10 m). Nine male athletes (4 sprinters, 3 decathlonists, 1 long jumper and 1 triple jumper; mean ± SD; age = 24.9 ± 3.9 yr; height = 180.4 ± 5.9 cm; weight = 80.3 ± 7.5 kg; 100 m record = 11.35 ± 0.29 s) performed measurements and different force-time, electromyographic (EMG) and kinematic variables were compared to sprint start. Most of the comparison was done to the block phase (the phase of force production towards start…

Effects of 5-Week of FIFA 11+ Warm-Up Program on Explosive Strength, Speed, and Perception of Physical Exertion in Elite Female Futsal Athletes

2022

Futsal is a sport that originates from soccer and is increasingly practiced all over the world. Since training and warm-up protocols should be sport-specific in order to reduce injuries and maximize performance, this study aimed to evaluate the effects of 5 weeks of the FIFA 11+ warm-up program on explosive strength, speed, and perception of physical exertion in elite female futsal athletes. Twenty-nine elite female futsal athletes participating in the Italian national championships were divided into two groups: the experimental group (EG) underwent 5 weeks of the FIFA 11+ warm-up program, and the control group (CG) underwent 5 weeks of a dynamic warm-up. We evaluated any effect on explosiv…