Egzersiz ve Spor Bilimleri Bölümühttps://hdl.handle.net/11655/952024-03-28T22:53:13Z2024-03-28T22:53:13ZZAMAN-SINIRLI BESLENME PROGRAMININ REKREATİF AKTİF ERKEKLERDE VÜCUT KOMPOZİSYONU, İNSÜLİN DUYARLILIĞI VE YAĞ OKSİDASYONU ÜZERİNE ETKİSİAktaş, Halehttps://hdl.handle.net/11655/346232024-02-13T12:06:29Z2024-02-08T00:00:00ZZAMAN-SINIRLI BESLENME PROGRAMININ REKREATİF AKTİF ERKEKLERDE VÜCUT KOMPOZİSYONU, İNSÜLİN DUYARLILIĞI VE YAĞ OKSİDASYONU ÜZERİNE ETKİSİ
Aktaş, Hale
Aktaş, H. The Effect of Time-Restricted Feeding Program on Body Composition, Insulin Sensitivity and Fat Oxidation in Recreationally Active Men. Hacettepe University, Graduate School of Health Sciences, Sport Sciences and Technology Program, Master's Thesis, Ankara, 2023. Time-restricted feeding (TRF) is the most preferred intermittent fasting model in which the feeding window of individuals is limited to certain times of the day and the fasting window is at least 12 hours.. The aim of this study was to determine the effect of a 6-week TRF program on body composition, insulin sensitivity, fat oxidation at rest and during exercise in active men. Thirty-one recreationally active male volunteers between the ages of 18-39, healthy, exercising at least 3 days a week for at least 1 year participated in the study. Participants were randomly assigned to the TRF (n=14) or control (n=17) group. The TRF group followed the 16:8 program for 6 weeks, while the control group was asked not to change their current eating habits. Body composition, resting metabolic rate and fat oxidation during submaximal exercise were measured before and after the 6-week program. In addition, blood samples were taken from the participants at the beginning and at the end of the study after a 12-hour fasting period. After determining that the data were normally distributed, a two-way repeated measures (group × time) analysis of variance (ANOVA) was used to examine the differences between and within groups before and after TRF application. Body weight (p=0.002; partial eta squared (p2) =0.280), muscle mass (p=0.015; p2=0.20), lean body mass (p=0.015; p2=0.19) and fat mass (p=0.017; p2=0.18) decreased significantly after 6 weeks of TRF program. Group×time interactions of all these variables were also statistically significant (p<0.05). These findings show that the changes in these variables in the groups within 6 weeks are statistically different. Repeated measures ANOVA results showed that there was no significant change in resting metabolic rate and carbohydrate oxidation between groups and over time (p>0.05). The decrease in resting respiratory exchange ratio (RER) (p=0.014; p2=0.19) and increase in resting fat oxidation (p=0.006; p2=0.23) were statistically significant in terms of group×time interaction. The 6-week TRF program did not significantly change fat and carbohydrate oxidation during exercise, RER during exercise and blood parameters related to metabolism (p>0.05). In conclusion, the 6-week TRF program improves body composition by reducing fat mass and body weight in young healthy men, while improving substrate oxidation at rest. Its effect on substrate oxidation during exercise is limited.
2024-02-08T00:00:00ZYÜZMEDE KULLANILAN FARKLI ANTRENMAN ŞİDDETİ GÖSTERGELERİNİN ZİRVE OKSİJEN TÜKETİMİ İLE İLİŞKİSİDenizli, Gökhanhttps://hdl.handle.net/11655/346222024-02-13T11:58:11Z2024-02-05T00:00:00ZYÜZMEDE KULLANILAN FARKLI ANTRENMAN ŞİDDETİ GÖSTERGELERİNİN ZİRVE OKSİJEN TÜKETİMİ İLE İLİŞKİSİ
Denizli, Gökhan
In this study, the relationships between swimming speed at lactate threshold, critical speed, maximal swimming speed, and swimming speeds at different distances (50m, 100m, 200m, and 400m) with peak oxygen consumption (VO2peak) and corresponding swimming speed were examined in swimmers. For this purpose, participants swum 25m, 50m, 100m, 200m, and 400m maximal swimming tests, as well as a 7x200m incremental test protocol in freestyle. The critical speed was determined from the slope of the regression curve obtained by plotting swimming speeds against corresponding time for different distances swum. Lactate concentration was measured from blood samples taken during the 7x200m incremental test, and the lactate threshold was determined using the lactate inflection point method.The study includes 35 swimmers (16 females and 19 males) aged 15-16, who achieved 500 or more FINA points at the national and international levels. Oxygen consumption is measured using a portable gas analysis system for 20 seconds immediately before exiting the pool after 7x200 test. Oxygen consumption values are determined using a back-estimation formula. Lactic acid measurement is performed from a finger blood sample using a hand analyzer post-tests. The study concludes that both female and male swimmers' critical speeds are found to be 93% of VO2peak swimming speeds, 97% of 200m swimming speeds, and 95% of 400m swimming speeds. Anaerobic threshold swimming speed is found to be 91% of VO2peak speed in males and 87% in females. Significant relationships are found in male swimmers between VO2peak and anaerobic threshold swimming speed, critical speed, 200m, and 400m swimming speeds. Unlike males, female athletes do not show a significant relationship between VO2peak and anaerobic threshold swimming speed. Only in males is there a significant relationship between maximal swimming speed and 50m swimming speed. In male athletes, significant relationships are found between VO2peak swimming speed and anaerobic threshold swimming speed, critical speed, 100m, 200m, and 400m swimming speeds. In contrast to male athletes, no relationship is found between VO2peak swimming speed and critical speed in female athletes.
2024-02-05T00:00:00ZAkut Yüksek Şiddetli Aralıklı Egzersiz ve Orta Şiddetli Sürekli Egzersizin Speksin ve Leptin Düzeylerine EtkisiAcar, Meldahttps://hdl.handle.net/11655/346212024-02-13T11:55:44Z2024-01-01T00:00:00ZAkut Yüksek Şiddetli Aralıklı Egzersiz ve Orta Şiddetli Sürekli Egzersizin Speksin ve Leptin Düzeylerine Etkisi
Acar, Melda
Regular physical activity and exercise play a crucial role in promoting overall well-being and improving health. For individuals with time constraints, high-intensity interval exercise (HIIE) is emerging as a valuable alternative. The fact that the health benefits of HIIE are equivalent to or greater than those of traditional moderate-intensity continuous exercise (MICE) suggests that this exercise model can be incorporated into individualized exercise prescriptions. Exercise exerts some of its health benefits through molecules called exerkines, which are released in response to acute or chronic exercise. Spexin, which is involved in many physiological processes such as appetite, weight control and glucose metabolism, is an exerkin that interacts with leptin. The aim of this study is to examine the effects of HIIE and MICE protocols with equalized total workload on serum spexin and leptin levels. Nineteen physicaly active young males (mean age: 25.7 ± 5.5 years; body weight: 73.3 ± 7.7 kg; height: 176,6 ± 6,2 cm; maximal oxygen consumption (VO2max): 44,5 ± 4,7 ml/min/kg) participated in HIIE and MICE sessions on a bicycle ergometer. The HIIE session consisted of 10x1 min of high-intensity exercise intervals at 90% of VO2max separated by 75 second of active recovery periods at 60 watts. The MICE session consisted of continuous cycling at 55% of VO2max, equal to the total workload achieved in the HIIE session. Venous blood samples were taken before, immediately after and 1 hour after each exercise session. Serum spexin and leptin concentrations were determined by enzyme linked immunosorbent assay (ELISA). Two-way analysis of variance (ANOVA) with repeated measures was used for statistical analysis of the data. Immediately after acute HIIE and MICE, serum spexin (HIIE: 174,32 ± 48,21; MICE: 186,53 ± 56,74 pg/ml) and leptin (HIIE: 335,98 ± 137,55; MICE: 302,94 ± 150,88 pg/ml) levels increased compared to baseline values (p<0.05). There was no significant difference between the effects of the two exercise protocols on serum spexin and leptin levels (p>0.05). In both exercise protocols, serum levels of spexin (HIIE: 156,63 ± 46,22; MICE: 165,79 ± 60,74 pg/ml) and leptin (HIIE: 273,71 ± 109,09; MICE: 264,71 ± 120,77 pg/ml) decreased to baseline levels 1 hour after exercise (p<0.05). The results of this study show that acute high-intensity intermittent exercise and moderate-intensity continuous exercise concentrations in active young males result in increased serum concentrations of spexin and leptin regardless of the exercise protocol. However, the levels of both molecules return to baseline levels 1 hour after the end of exercise.
2024-01-01T00:00:00ZSporcularda McConnell Bantlama Tekniğinin Diz Kinematiği ve Tek Bacak Sıçrama Performansı Üzerine Anlık EtkileriHarbili, Orhun Alphttps://hdl.handle.net/11655/345502024-01-31T11:20:35Z2023-01-01T00:00:00ZSporcularda McConnell Bantlama Tekniğinin Diz Kinematiği ve Tek Bacak Sıçrama Performansı Üzerine Anlık Etkileri
Harbili, Orhun Alp
Harbili, O.A., Instant Effects of McConnell Taping Technique on Knee Kinematics and Single-Leg Jump Performance in Athletes, Hacettepe University Graduate School Health Sciences, Sports Sciences and Technology Program Master's Thesis, Ankara, 2023. Patellofemoral pain syndrome (PFPS) is a syndrome that accounts for 20-40% of all knee-related problems and it is common in society. PFPS may lead to taking a break or quitting sports in case it is seen in athletes. Although the etiology of PFPS is not fully known, one of the main reasons of PFPS syndrome is that abnormal lateral gliding of patella in movements such as squatting and jumping due to the difference in the strength and firing rates of the VM and VL muscles. The purpose of this study is to examine the acute effect of McConnell patellar taping technique on single leg squat jump performance and knee kinematics. Yet, this study focuses on athletes who are asymptomatic in terms of PFPS with a lateral glide of the patella of 0.5 cm or more. For this purpose; in the single leg squat jump performance of ten athletes with and without tape, vertical ground reaction forces (Kistler, BioWare), muscle activation (Noraxon Ultium, MR3) and knee kinematic data (Vicon, Nexus) were collected synchronously. It is seen that taping does not cause a significant change in vertical jump height but it has a high effect size on the maximum knee flexion angle in the pushing phase and a medium effect size in the landing phase. While there was no significant difference between the situations in vertical ground reaction forces in the push-off and landing phases, it was found that the band had a medium effect size on the vertical ground reaction force in the landing phase. In future, studies will reveal more clearly the effect of taping on vertical jump performance by examining athletes who are symptomatic for PFPS.
2023-01-01T00:00:00Z