Browsing by Author "Cabuk, Salih"

Now showing 1 - 6 of 6

The Acute Effects of Hip Thrust and Glute Bridge Exercises with Different Loads on Sprint Performance and Horizontal Force-Velocity Profile in Adolescent Soccer Players: A Post-Activation Performance Enhancement Approach
(Wiley, 2025) Cabuk, Salih; Ince, Izzet
This study examines the acute effects of post-activation performance enhancement (PAPE) with different loads (84% and 60% 1-RM) and exercises (hip thrust; HT and glute bridge; GB) on sprint performance (SP) and horizontal force-velocity (HF-V) profile components in adolescent male soccer players. The participants were randomly assigned to three groups: hip thrust group (HTG; n = 13), glute bridge group (GBG; n = 13), and control group (CG; n = 14). Sprint tests at distances of 10, 20, and 30 m were conducted pre-PAPE and post-PAPE protocols with a 7 min rest period. HTG and GBG executed HT and GB exercises at 84% and 60% of their 1-RM loads. Hedge's g was computed to assess within-group (pre-PAPE vs. post-PAPE) comparisons (Within-ES) and between-group (post-PAPE protocols) comparisons (Between-ES). PAPE protocols at 84% and 60% 1-RM loads demonstrated moderate effects on F0rel, Pmaxrel, FVslope, and DRF and small effects on V0, RFmax, and S20m in both HTG and GBG. Conversely, the CG exhibited trivial effects across parameters. Compared to the HTG 84% 1-RM protocol, the GBG 84% 1-RM protocol showed small effects on V0 and S10m. The HTG 60% 1-RM protocol had a small effect on RFmax compared to both GBG 84% and 60% 1-RM protocols. Both HTG and GBG 84% and 60% 1-RM protocols demonstrated small effects on S30m compared to the CG. These findings suggest that GB exercises may offer a viable alternative to HT exercises for eliciting PAPE effects, particularly in enhancing SP and related mechanics in adolescent soccer players.
Comparing the Effects of 25-Minute Electrical Muscle Stimulation Vs. 90-Minute Full-Body Resistance Training on Body Composition and Strength: A 20-Week Intervention
(Elsevier Singapore Pte Ltd, 2025) Ulupinar, Suleyman; Ari, Ugur; Kishali, Necip Fazil; Ince, Izzet; Cabuk, Salih; Gencoglu, Cebrail; Ozbay, Serhat
Objectives: Electromyostimulation (EMS) and traditional resistance training (TradRT) are widely used methods for improving muscle strength and body composition. However, comparative studies employing a multi-week longitudinal design remain limited. This study aimed to investigate the effects of 20 weeks of EMS vs. TradRT on body composition and strength performance in physically active adults. Methods: Forty-six participants were randomly assigned to either the EMS group (n = 22) or the TradRT group (n = 24). The EMS group performed twice-weekly, 25-min whole-body EMS sessions, while the TradRT group completed twice-weekly, 90-min full-body resistance training sessions. Results: Assessments of body weight, body mass index (BMI), fat percentage, and maximal strength were conducted at baseline, 10 weeks, and 20 weeks. A significant time effect was observed for all variables (p < 0.001), indicating improvements in both groups. However, group x time interactions revealed distinct adaptation patterns. The TradRT group exhibited greater reductions in body fat percentage and superior strength gains in bench press, leg press, shoulder press, and triceps pushdown, and abdominal strength. Conversely, the EMS group showed greater reductions in body weight and BMI. No significant interaction effect was observed for biceps curl strength. Both EMS and TradRT were effective in improving strength and body composition, but TradRT led to greater strength development and fat reduction, while EMS was more effective for weight and BMI reduction. Conclusions: These findings suggest that EMS may serve as a viable alternative for individuals unable to engage in high-load resistance training, whereas TradRT remains superior for maximizing strength and fat loss.
Enhancing Post-Exercise Oxygen Kinetics Modeling with Physiological Bounds and Manual VO2_baseline Input: A Novel Approach
(Wiley, 2025) Ulupinar, Sueleyman; Ince, Izzet; Gencoglu, Cebrail; Ozbay, Serhat; Cabuk, Salih
This study addresses a critical limitation in existing computational tools for modeling post-exercise oxygen consumption kinetics (VO2). Although exponential modeling provides practical insights into recovery dynamics, the inability to incorporate an individual's pre-exercise baseline oxygen consumption value (VO2_baseline) can lead to inaccurate interpretations. A user-defined baseline allows for more precise modeling by aligning recovery kinetics with the true physiological endpoint, representing the individual's actual recovery target after a sufficient rest. To overcome this limitation, this study employs a customized Python algorithm that incorporates user-defined baseline VO2 and uses both mono-exponential and bi-exponential models, aiming to improve upon existing analytical methods. Twenty-two male amateur soccer players participated in this study and performed a 30-s Wingate test. VO2 was measured continuously before, during, and after exercise via a metabolic gas analyzer. Both mono-exponential and bi-exponential models were used to analyze post-exercise VO2 kinetics. The analysis was performed using Origin software (as the reference tool), GedaeLab (a specialized web-based platform), and a custom-developed Python algorithm. The bi-exponential model demonstrated superior fit compared to the mono-exponential model with higher determination coefficient (R2) values. Specifically, R2 values were 0.963 +/- 0.013 and 0.805 +/- 0.078 for the bi-exponential and mono-exponential models, respectively. The bi-exponential model also provided a more accurate approximation of real post-exercise oxygen consumption integrals at both 5 min and 15 min. Additionally, variations in VO2_baseline values had different impacts on key parameters in both models, showing that higher VO2_baseline values generally improved the model fit in the mono-exponential model but had minimal impact on the bi-exponential model.
Investigation of the Intra and Inter-Day Reliability of the Athletic Shoulder Test Using the Wii Balance Board in Volleyball Players
(BMC, 2025) Ciftci, Muhammet Cihat; Celik, Seyfullah; Cabuk, Salih; Ulupinar, Suleyman; Ince, Izzet
This study investigates the intra-day and inter-day reliability of the athletic shoulder test (AST) using the Nintendo Wii Balance Board (NWBB) in volleyball players. Twenty experienced players aged 14.48 +/- 1.327 years participated, with no chronic health issues or injuries. Using a prospective cohort design, participants performed two trials in each of the I, Y, and T positions with both arms across three sessions conducted on two separate days. Reliability was assessed using standard error of measurement (SEM), minimum detectable change (MDC), and coefficient of variation (CV). Intra-day ICC values ranged from 0.908 to 0.969, and inter-day ICC values ranged from 0.819 to 0.948. SEM values varied from 1.996 to 6.781 N, while MDC values ranged from 5.533 to 18.708 N. CV values were within acceptable limits. These results indicate that the AST using NWBB provides good to excellent reliability for both intra-day and inter-day measurements in volleyball players.
Limb Strength Asymmetries in Elite Academy Volleyball Players: Impacts on Performance Outcomes and Insights Derived from Principal Component Analysis
(BMC, 2025) Yesilyurt, Hakki; Cabuk, Salih; Ince, Izzet; Tortu, Erkan; Ulupinar, Suleyman
BackgroundThe purpose of this study is twofold: (1) to investigate intra- and inter-limb strength imbalances and asymmetries in elite academy volleyball players and their relationships with sprint performance, kinetics, kinematics, countermovement jump (CMJ), squat jump (SJ), and agility performances and (2) to apply principle component analysis (PCA) to identify and better understand the underlying factors that contributing to volleyball performance.MethodsThirty-seven elite academy volleyball players completed four testing sessions, assessing pro-agility, sprint, isokinetic strength at 60 degrees s-1 and 180 degrees s-1, and jump performance. Intra-limb asymmetries were calculated using hamstring-to-quadriceps ratios, whereas inter-limb asymmetries were determined using the percentage difference method.ResultsAt 60 degrees s-1, the intra-limbNDL ratio showed negative correlations with dominant and non-dominant leg ground contact time (GCTDL and GCTNDL, respectively) and a positive correlation with dominant leg flight time (FTDL) and difference between CMJ and SJ heights (CMJSJdiff). Hamstring asymmetry (Hasymmetry) at 60 degrees s-1 correlated positively with 5 m (S5m) and 20 m (S20m) sprint performances and negatively with theoretical maximal velocity (V0) while at 180 degrees s-1, it showed small negative correlations with V0. At 180 degrees s-1, quadriceps asymmetry (Qasymmetry) correlated positively with S5m, relative theoretical maximum force (F0rel), and relative theoretical maximum power (Pmaxrel) but negatively with V0, CMJDL, and CMJ. The PCA results showed that the first four principal components, explaining 51.0% of the total variance and contributing to 88.2% across 12 dimensions, were mainly linked to jump performance, lower-limb strength, sprint performance, and intra-limb ratios.ConclusionsIntra-limb and inter-limb strength imbalances and asymmetries were found to be weakly to moderately associated with sprint performance, sprint kinetics, kinematics, and jump-related outcomes. PCA results further identified jump variables, lower-limb strength, sprint metrics, and intra-limb ratios as key, interconnected contributors to volleyball performance.
Validity and Reliability of the Athletic Shoulder Test: A Brief Systematic Review and Meta-Analysis
(JMNI, 2025) Ulupinar, Suleyman; Ince, Izzet; Gencoglu, Cebrail; Asan, Selim; Cabuk, Salih; Ozbay, Serhat
This systematic review and meta-analysis aimed to synthesize the validity and reliability of the AST and explore its measurement precision through standard error of measurement (SEM) and minimal detectable change (MDC). A systematic search of PubMed, Scopus, and Web of Science databases was conducted to identify studies evaluating the AST's psychometric properties. Studies reporting quantitative validity or reliability data (e.g., correlation coefficients, ICC) were included. A random-effects meta-analysis was performed to pool validity and reliability estimates, with heterogeneity assessed using I-2 and Tau(2). SEM and MDC values were systematically reviewed to evaluate measurement precision. Seven studies were included in the systematic review, with five studies (42 validity estimates) and six studies (35 reliability estimates) contributing to the meta-analysis. The AST demonstrated promising levels of validity (pooled r = 0.923) and reliability (pooled r = 0.958), although substantial heterogeneity was observed (I-2 > 85%) and should be considered when interpreting these findings. No significant publication bias was detected. SEM ranged from 0.85-20.43 N, and MDC from 2.37-56.63 N, indicating variable measurement precision. Overall, the AST appears to be a potentially useful tool for assessing shoulder function, with relevance for clinical and research applications.