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    The Acute Effect of High-Intensity Functional Exercises on Circadian Rhythm and Anaerobic Performance Parameters
    (2022) Eken, Özgür; Bayer, Ramazan; Bayrakdaroğlu, Serdar
    Kickboxing is a sport that involves high intensity and short intervals. High intensity functional training can contribute to training kickboxers specific to the competition. The purpose of this study is to examine the acute effect of high-intensity functional exercises on circadian rhythm and anaerobic performance parameters. The study consisted of 15 volunteer male kickboxers (age, 20.67± 1.23 years; height, 173.60± 3.18 cm; 69, 20±2.67 kg; BMI 23.03±.49) between the ages of 18-25. The research protocol consisted of multimodal HIFT exercises performed at different times of the day. After HIFT protocol; T-line agility, vertical jump, average and peak power data were obtained from the volunteers at different times of day (09.00 am; 01.00 pm; 05.00 pm). There was find statistically significant difference between vertical jump [F(1,145)= 129.54 p=.000, partial eta square:,902], peak power values [F(1,275)= 122.89 p=.000, partial eta square:,898], average power values [F(1,139)= 124.23 p=.000, partial eta square:,899], T- line agility times [F(1,925)= 39,227 p=.000, partial eta square:,737] after HIFT in the morning, afternoon and evening protocols (p< 0.05). The best scores were obtained in the evening (05.00 pm) values for all parameters. It was determined that HIFT had better effect on vertical jump, average power, peak power and T-line agility in the evening than morning and afternoon hours.
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    Effect of different specific warm-up protocols and time of day on optimum power performance in kickboxers
    (2023) Bayer, Ramazan; Nobari, Hadi; Eken, Özgür; Bayrakdaroğlu, Serdar; Koç, Hürmüz; Pardos, Elena Mainer; Yağın, Fatma Hilal
    Numerous variables can affect performance before the competition. Nevertheless, it could be a subject of curiosity to find out whether a warm-up strategy has a more positive effect on the power performance of kickboxers. The purpose of this study is to evaluate the effect of different specific warm-up protocols and time of day on optimum power performance in kickboxers. Ten volunteer males performed three different warm-up routines in random order. The warm-up protocols consisted of only 20 min for each group. The groups with low-intensity aerobic running (NSWU) and specific warm-ups (SWU-20m) performed 20-min protocols. The other group followed 10 minutes of jogging and 10 minutes of specific warm-up (SWU-10m). All groups followed the warm-up randomly at two different periods of the day (i.e. morning: 09:00-10:00 and evening: 16:00-17:00) on non-consecutive days. A statistically significant difference was found between the groups in terms of Mean Propulsion (W) (F=3.518; p2=0.036). There was a statistically significant difference in Mean propulsive Power (W) between NSWU and SWU-10m (p3= 0.0007) in addition there was also a statistically significant difference in SWU-10m and SWU-20m (p3= 0.0106) and, NSWU and SWU-20m (p3= 0.415) protocols. In conclusion, mean propulsion (W) performance showed diurnal variation, and performances of the kickboxers’ can be affected more positively in the evening hours, especially after SWU protocols.
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    The Effects of High Intensive Interval Training (HIIT) on Brain-Derived Neurotrophic Factor (BDNF) and Cardiovascular Health: A Review
    (2022) Bayrakdaroğlu, Serdar; Topsakal, Nuri; Eken, Özgür
    High-intensity interval training (HIIT) programs have lately gained popularity because they produce beneficial adaptations for both inactive and athletes, as well as positive health and performance benefits and time efficiency. Therefore, it was purposed to review scientific research results about the effects of HIIT programs on BDNF and cardiovascular health. Although there are research findings suggesting that HIIT may be an effective strategy for promoting elevation of BDNF concentrations, current research seems to be rather limited and inconclusive. It can be thought that exercise intensity is a factor affecting BDNF activation. In healthy people, there seems to be a positive linear relationship between exercise intensity and BDNF levels of acute exercise. However, further experimental studies are needed to elucidate the effect of HIIT on BDNF in humans with metabolic or cardiovascular diseases. However, it can be suggested that high intensity can be an significant achievement factor to design an effective exercise programs and the HIIT methodology has a critical importance for improving cardiovascular function, particularly in healthy individuals. In conclusion, while existing studies show that high-intensity interval training (HIIT) programs can improve cardiovascular health in some populations, further scientific research is needed to determine the efficiency of this strategy in producing physiological adaptation to exercise.