The purpose of this study was to investigate the relationship between adolescents’ biological maturation level and their muscle power, as well as their overall muscle strength. Overall, 691 adolescents (414 boys and 277 girls) aged 12.01–11.96 (measured for body mass, body height as well as vertical jump, muscle power, and muscle strength). There was a statistically significant difference in terms of average right and left grip strength, vertical jump, and power in the late maturation group. For the body height and vertical jump averages in male adolescents, it was observed that the body height and vertical jump averages in the late group were significantly lower than in the early and on-time maturation groups. For female adolescents’ chronological age, sitting height, body mass, BMI, left and right grip strength, and power averages were found to be significantly higher compared with the on-time group (p < 0.05). It was established that biological maturation has a substantial link with vertical jump height and power, as well as grip strength on the right and left hands.

Background: The purpose of this study was to determine the eating behaviors, obesity and physical activity status of children of similar ages living in rural and urban areas and to examine these relationships during the coronavirus disease (COVID-19) pandemic process. Method: The research was conducted using the scanning model. The research group consists of children living in rural and urban areas in Turkey. The sample of the study consists of a total of 733 adolescent participants, 351 females (47.9%) and 382 males (52.1%). After anthropometric measurements were made, the Physical Activity Questionnaire for older children and the Yale Food Addiction Scale for children 2.0 were used to determine the food addiction and physical activity status of children during the COVID19 pandemic process. Since the groups were homogeneously distributed, independent samples t-test and Pearson correlation test were used. Result: In terms of food addiction and physical activity levels, children living in the urban have higher scores than children living in rural areas. In addition, children living in the urban were taller and have higher body mass values than those in rural areas. In terms of physical activity level and food addiction levels, while girls living in the urban had higher activity levels than those living in rural areas, no statistically significant difference was found between the physical activity levels of boys. When evaluated in terms of general and gender, it was determined that children living in rural areas were overweight and obese at a higher rate. Obese children had higher levels of food addiction and lower physical activity levels than non-obese children. Conclusion: In order to prevent childhood obesity, the level of food addiction should be reduced as well as increasing the level of physical activity. This study is limited in terms of cross-sectional evaluation. Future research can experimentally reveal how much obesity is reduced by methods such as exercise and diet interventions.

This study investigates the differences in agility, speed, jump and balance performance and shooting skills between elite hearing-impaired national team soccer players (HISP) and without-hearing-impairment elite soccer players (woHISP). Players were divided into two groups, the HISP group (n = 13; 23.5 ± 3.1 years) and the woHISP group (n = 16; 20.6 ± 1.4 years), and were tested in three sessions, seven apart, for metrics including anthropometrics, speed (10 m, 20 m and 30 m), countermovement jump (CMJ), agility (Illinois, 505, zigzag), T test (agility and shooting skills), and balance. The results showed that 30 m, 20 m and 10 m sprint scores, agility/ skills (sec), shooting skills (goals), zigzag, Illinois, and 505 agility skills, and countermovement jump scores were significantly lower among players with hearing impairments (p < 0.05). There were no significant T test differences between HISP and woHISP (p > 0.05). The HISP showed right posterolateral and posteromedial, and left posterolateral and posteromedial scores that were lower than the woHISP group (p < 0.05). Anterior scores were not significantly different between each leg (p > 0.05). In conclusion, the HISP group showed higher performance scores for speed (10 m, 20 m and 30 m), CMJ, agility (Illinois, 505, zigzag) and T test (sec and goals), but not balance. Hearing-impaired soccer players are determined by their skill, training, and strategy, not their hearing ability.

Swimming, an Olympic sport with diverse distances and energy systems, requires early specialization for elite success. High intensity interval training (HIIT) is a fundamental method used by swimmers to enhance performance, offering both aerobic and anaerobic benefits. This study aimed to examine the effects of a 12-week HIIT program with varying volumes on adolescent swimmers’ performance parameters. A total of 50 participants were divided into three groups High Intensity Low Volume (HILV), Moderate Intensity Moderate Volume (MIMV), Low Intensity High Volume (LIHV), and their training sessions consisted of 10 sets with 60 s rest intervals between repetitions and 3 min rest intervals between sets. The intensity was determined based on a pre-test 100 m times. The results indicate significant improvements in anthropometric measurements, including weight, Body Mass Index (BMI), and body fat percentage, within each group, with no significant differences between groups. Swimming performance for various distances (50 m, 100 m, 200 m, and 800 m) showed significant temporal improvements in all groups, with stroke parameters such as stroke rate and length also exhibiting significant improvements (p < 0.05). Resting heart rate and swimming performance at 100 m and 200 m differed significantly between groups, highlighting the impact of training volume on specific outcomes. In conclusion, this study highlights the positive impact of interval training on the swimming time (50 m, 100 m, 200 m, and 800 m), stroke rate (SR), strokes per length (SPL), stroke length (SL), Borg scale (BS) for various distances, emphasizing the need for tailored training programs to maximize their development and potential.

Amaç: Çocukluk döneminde düzenli fiziksel aktiviteye katılım sağlıklı bir yaşamın sürdürülmesinin, yanı sıra kemik ve kas gelişiminde olumlu katkısından dolayı büyüme ve gelişmede oldukça önemlidir. Bu çalışmanın amacı adölesan dönem çocukların fiziksel aktiviteye katılımlarını motive eden faktörleri incelemektir.Gereç ve Yöntemler: Bu araştırmada nicel araştırma yöntemlerinden tarama modeli kullanılmıştır. Katılımcılar Türk nüfusundan oluşan bir örneklem (n=550; %41.8 kız, %58.2 erkek) grubundan oluşmuştur. Katılımcılar sosyo-demografik özelliklerin yanı sıra fiziksel aktiviteye katılım motivasyonları ile ilgili soruları yanıtlamıştır. Katılımcıların fiziksel aktivite motive edicilerini belirlemek için bir fiziksel aktivite motivasyon ölçeği kullanılmıştır. Veriler SPSS 22.0 kullanılarak analiz edilmiştir.Bulgular: Bu çalışmanın bulgularına göre katılımcıların fiziksel aktivite katılım motivasyonları yüksek olarak tespit edilmiştir. Kızlar ve erkekler karşılaştırıldığında toplamda ve tüm alt boyutlarda bireysel nedenler, çevresel nedenler ve nedensizlik alt boyutunda erkeklerin fiziksel aktivite katılım motivasyonu kızlardan daha yüksek bulunmuştur. Aylık gelir durumlarına göre Fiziksel Aktivite katılım Motivasyon Ölçeği toplam skorları arasında anlamlı farklılık tespit edilmiştir. Aylık gelir durumuna göre toplam Fiziksel Aktivite katılım Motivasyon Ölçeği ve bireysel nedenler alt boyutunda gelir düzeyi çok iyi olanların fiziksel aktivite katılım motivasyonu daha yüksek bulunmuştur. Vücut kitle indeksi durumları ve fiziksel aktivite katılım motivasyonları arasında istatistiksel olarak anlamlı farklılık bulunmamıştır.Sonuç: Adölesanların bakış açısına göre, fiziksel aktiviteye katılımlarını motive eden faktörler arasında “Kendimi iyi hissettirir, kendime olan güveni arttırır, beni çok eğlendirir” cevapları çoğunluktaydı. Adölesanlar arasında aktif yaşam tarzlarının benimsenmesini etkin bir şekilde teşvik etmek için eğitim kurumları merkezli eylem stratejileri ve fiziksel aktivite müdahale programlarının geliştirilmesi gerekmektedir.

Background: The purpose of this study was to investigate the effects of 8-week resistance training with different training volumes on body composition, maximum strength, peak power, and muscle thickness in non-training women. Methods: This was a 3-arm, prospectively designed, randomized controlled trial. A total of 45 adult women aged 20.7 ± 1 years, the mean heights of the participants were 166 ± 0.07 cm, body weight was measured as 54.5 ± 8.8 kg, and body mass index was 19.9 ± 2.1 kg/m². They were randomized to low-volume training resistance training (LVT; n = 15, 3 sessions of 12 exercises per week), moderate-volume training resistance training (MVT; n = 15; 4 sessions of 12 exercises per week), and high-volume resistance training (HVT; n = 15; 5 sessions of 12 exercises per week) for 8 weeks. The muscle thickness (MT) of the vastus lateralis was assessed at baseline and 8 weeks later using a portable ultrasound device. Results: A total of 39 adult women completed the study, with 2 participants from each group lost to follow-up. All experimental groups 1RM increased (P = .001, effect size (ES) = 0.463) All groups showed improved muscle thickness (MT) (P = .001) and CMJ (P = .004). The group × time interaction is statistically significant (P = .001) suggests that the changes in muscle thickness over time differ significantly between the different training volume groups (η _p ²) is 0.368. Conclusion: In untrained young women, resistance training improved muscle hypertrophy, maximal strength, power, and body composition in untrained young women. However, 4 sessions MVT per week were superior to LVT and HVT sessions, suggesting a nonlinear dose-response relationship favoring moderate volume over low or high volumes, at least in previously untrained young women. Trial Registration: ClinicalTrials.gov (NCT06449300)