Alper Aslan

Cardiovascular Responses, Perceived Exertion and Technical Actions During Small-Sided Recreational Soccer: Effects of Pitch Size and Number of Players

Abstract The aim of this study was to determine the cardiovascular, perceived exertion and technical effects of altering pitch size and number of players in recreational soccer match-play. The further aim was to evaluate to what extent exercise intensity during various game formats corresponds to the recommended intensity level for cardiovascular fitness improvement. Ten male recreational players aged 31.7±7.6 years (mean ± SD) completed four variations of smallsided games (except for goalkeepers, 5-a-side and 7-a-side on small and large pitches) during which heart rate, perceived exertion and technical actions were evaluated. Two-way analysis of variance on repeated measures was applied to collected data. The results indicated that an average workload expressed as heart rate and percentage of heart rate reserve during 5-a-side games was higher than for 7-a-side games. The rate of perceived exertion values were moderate and similar for all formats of games. The players performed more dribbling and successful passes, but fewer unsuccessful passes during 5-a-side games. Furthermore, the number of ball possessions and unsuccessful passes was higher on a small pitch than on a large one. Consequently, the current findings suggest that, independent of pitch size, the cardiovascular demands imposed on participants increase when the game is played with fewer players. However, all formats of recreational soccer can be used as an effective activity to promote cardiovascular fitness. Finally, participants may have more chance to perform basic technical actions during 5-a-side games on small and large pitches.

Objectively measured activity in 8-10-year-old Turkish children: relationship to health-related fitness.

No objective data regarding the physical activity (PA) levels of young Turkish children currently exist. Furthermore, whether habitual PA is associated with the components of health‐related fitness among children is unclear. The aim of this study was to evaluate the patterns and levels of objectively measured PA in prepubertal Turkish children and its relationship with body fatness, aerobic and anaerobic fitness.

GENÇ FUTBOLCULARDA YÜKSEK ŞİDDETTE YÜKLENME SONRASINDA TOPARLANMA DİNAMİKLERİ.

Bu calismanin amaci, supramaksimum siddette The aim of this study was to compare recovery speed yuklenme sonrasinda bazi fizyolojik degiskenlere iliskin toparlanma hizinin farkli mevkilerdeki futbolcular arasinda karsilastirilmasidir. Calismaya 13 defans, 13 orta saha ve 11 forvet olmak uzere toplam 37 genc futbolcu gonullu olarak katilmistir. Arastirma grubundaki sporcularin dinlenik, Wingate testi sirasinda ve testi takip eden 20 dakikalik toparlanma doneminde oksijen tuketimi (VO2), ve kalp atim hizi (KAH) degerleri olculmustur. Ayrica, Wingate testi oncesinde, testin tamamlanmasinin hemen ardindan ve takip eden 3 dakikalik araliklar ile kan laktat (LA) konsantrasyonlari belirlenmistir. Maksimum oksijen tuketimi (VO2maks) ve 4 mmol/L LA kosu hizi degerleri ise 100 m’lik dairesel parkurda uygulanan modifiye mekik testi suresince solunum gazlarinin toplanmasi ve testin her hiz asamasinin sonunda alinan kan ornekleri yardimiyla belirlenmistir. VO2 ve KAH degerlerine iliskin toparlanma yuzdesi asagidaki esitlik yardimiyla belirlenmistir. [(Test Ortalamasi – Dinlenik Ortalama) – (Toparlanma Dakikasindaki Ortalama – Dinlenik Ortalama) x 100 / (Test Ortalamasi – Dinlenik Ortalama)]. LA eliminasyon hizinin gostergesi olarak ise test sonrasinda ulasilan zirve LA konsantrasyonunun yarilanma suresi (LAys) kabul edilmistir. Incelenen degiskenler acisindan mevkiler arasinda fark olup olmadigi tek yonlu varyans analizi ile test edilmistir. Defans, orta saha ve forvet mevkilerinde oynayan futbolcularin VO2maks ve 4 mmol/L LA kosu hizi degerleri benzer bulunmustur (p>0.05). Ayni sekilde, VO2ve KAH degerleri acisindan toparlanmanin ilk 3 dakikasi icerisinde (hizli toparlanma periyodu) ve sonrasinda (yavas toparlanma periyodu) toparlanma hizlarinin mevkiler arasinda benzer oldugu saptanmistir (p>0.05). Ayrica, LAys degerleri acisindan da mevkiler arasindaki fark anlamli bulunmamistir (p>0.05). Bu sonuclar, aerobik antrenmanlilik duzeyi benzer olan musabaka donemindeki genc futbolcularda supramaksimum bir yuklenme ardindan toparlanma dinamiklerinin mevkiler arasinda benzer oldugunu gostermektedir