Turkiye Klinikleri Journal of Sports Sciences

.: ORIGINAL RESEARCH
Kafein Alım Zamanının Maksimal Kuvvet ve Dikey Sıçramaya Etkisi
Effect of Caffeine Intake Time Before Loading on Muscular Strength and Vertical Jump
Akif FİDANa, Nurtekin ERKMENa, Yağmur KOCAOĞLUa
aSelçuk Üniversitesi Spor Bilimleri Fakültesi, Antrenörlük Eğitimi Bölümü Konya, TÜRKİYE
Turkiye Klinikleri J Sports Sci. 2021;13(1):46-55
doi: 10.5336/sportsci.2020-76641
Article Language: TR
Full Text
ÖZET
 Amaç: Bu araştırmanın amacı; yüklenmeden 30 ve 60 dk önce gerçekleştirilen kafein takviyesinin düzenli olarak direnç antrenmanı yapan erkeklerin alt ve üst vücut kuvveti, dikey sıçrama yüksekliği, algılanan zorluk ve algılanan ağrı düzeylerine etkilerini incelemekti. Gereç ve Yöntemler: Araştırmaya, ağırlık antrenman deneyimli 45 erkek gönüllü olarak katıldı (yaş ortalamaları 25,20±7,71 yıl, vücut ağırlığı ortalamaları 78,53±9,31 kg, boy uzunluğu ortalamaları 177,46±6,54). Katılımcılar araştırma öncesinde rastgele 3 gruba ayrıldı: 1) Kafein 30 Grubu (KAF 30, n=15), 2) Kafein 60 Grubu (KAF 60, n=15), 3) Plasebo Grubu (PL, n=15). Vücut ağırlığı başına 5 mg/kg kafein takvi yesi 250 ml suya karıştırılarak testlerden 30 dk (KAF 30 için) veya 60 dk (KAF 60 için) önce uy gulandı. PL grubuna ise yapay tatlandırıcı ilave edilmiş 250 ml su içirildi. Katılımcılara kafein takviyesiz ve kafein takviyeli koşullarda, 1 tekrar maksimum back squat (1TM BS), 1 tekrar maksimum bench press (1TM BP) ve dikey sıçrama testleri ile Borg skalası ve sayısal ağrı ölçeği 2 kez uygulandı. Verilerin analizinde, karışık ölçümler için iki faktörlü ANOVA kullanıldı. Bulgular: Direnç antrenmanlı aktif erkeklerde kafein takviyesinin 1TM BP, 1TM BS ve dikey sıçrama performansını ve 1TM BP ve 1TM BS egzersizleri sonrasında algılanan zorluk ve algılanan ağrı düzeyini etkilemediği görüldü (p>0,05). Bunun yanı sıra, yüklenmeden 30 dk ve 60 dk önce kafein alımının maksimal kuvvet ve dikey sıçrama, aynı zamanda algılanan zorluk ve ağrı düzeylerini etkilemediği belirlendi. Sonuç: Egzersizden 30 dk ve 60 dk önce yapılan kafein takviyesiyle üst ve alt vücut kuvvetinde doğrusal artışlar görülmesine karşın kafein takviyesinin 1TM BP, 1TM BS ve dikey sıçrama performansını etkilemeyebileceği söylenebilir. KAF 30 grubunda görülen rakamsal gelişimler, kafein takviyesinin erken bir etkisinin işaretçisi olabilir.

Anahtar Kelimeler: Kafein; kafein alım zamanı; maksimal kuvvet; direnç antrenmanı
ABSTRACT
 Objective: This study aimed to find out effects of caffeine intake 30 min and 60 min before each exercise trial on maximal strength and vertical jump in resistance-trained men. Material and Methods: Forty-five resistance-trained male volunteered to participate to the study (age: 25.20±7.71 year, body weight: 78.53±9.31 kg, height: 177.46±6.54). Subjects were randomly divided in three groups: 1) Caffeine intake 30 min before exercises (CAF 30, n=15), 2) Caffeine intake 60 min before exercises (CAF 60, n=15) and placebo (PL, n=15). One repetition maximum bench press (1RM BP), one repetition maximum back squat (1RM BS), vertical jump, rating of perceived exertion (RPE), and level of received pain were measured with/without caffeine intake two times. Subjects ingested 5 mg/kg powder caffeine with 250 mL water 30 min or 60 min before exercises. PL group ingested 250 mL water with artificial sweetener. A two-way repeated measures ANOVA was used for data analyses. Results: There was no significant effect of caffeine on 1RM BP, 1RM BS and vertical jump in resistance-trained men (p>0.05). Caffeine intake did not change RPE and level of received pain after 1RM BP, 1RM BS exercises (p>0.05). No significant difference was found in 1RM BP, 1RM BS, vertical jump, RPE and the level of received pain between CAF 30 and CAF 60 (p>0.05). Conclusion: It can be said that caffeine intake may not affect 1RM BP, 1RM BS and vertical jump height, although linear increases in upper and lower body strength were observed with caffeine supplementation 30 min and 60 min before exercise. The numerical improvements seen in the CAF 30 group may indicate an early effect of caffeine supplementation.

Keywords: Caffeine; caffeine intake time; maximal strength; resistance training
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www.turkiyeklinikleri.com website belongs to Ortadoğu Advertisement Presentation Publishing Tourism Education Architecture Industry and Trade Inc. and is designed in order to inform physicians in the field of health

www.turkiyeklinikleri.com cannot reach to user’s identity, address, service providers or other information. The users may send this information to the website through forms if they would like to. However, www.turkiyeklinikleri.com may collect your hardware and software information. The information consists of your IP address, browser type, operating system, domain name, access time, and related websites. www.turkiyeklinikleri.com cannot sell the provided user information (your name, e-mail address, home and work address, phone number) to the third parties, publish it publicly, or keep it in the website. Gathered information has a directing feature to be a source for the website’s visitor profile, reporting and promotion of the services.

www.turkiyeklinikleri.com uses the taken information:

-To enhance, improve and maintain the quality of the website

-To generate visitor’s profile and statistical data

-To determine the tendency of the visitors on using our website

-To send print publications/correspondences

-To send press releases or notifications through e-mail

-To generate a list for an event or competition

By using www.turkiyeklinikleri.com you are considered to agree that;

-Ortadoğu Advertisement Presentation Publishing Tourism Education Architecture Industry and Trade Inc. cannot be hold responsible for any user’s illegal and immoral behavior,

-Terms of use may change from time to time,

-It is not responsible for other websites’ contents it cannot control or the harms they may cause although it uses the connection they provided.

Ortadoğu Advertisement Presentation Publishing Tourism Education Architecture Industry and Trade Inc. may block the website to users in the following events:

-Information with wrong, incomplete, deceiving or immoral expressions is recorded to the website,

-Proclamation, advertisement, announcement, libelous expressions are used against natural person or legal identity,

-During various attacks to the website,

-Disruption of the website because of a virus.

Written, visual and audible materials of the website, including the code and the software are under protection by legal legislation.

Without the written consent of Ortadoğu Advertisement Presentation Publishing Tourism Education Architecture Industry and Trade Inc. the information on the website cannot be downloaded, changed, reproduced, copied, republished, posted or distributed.

All rights of the software and the design of the website belong to Ortadoğu Advertisement Presentation Publishing Tourism Education Architecture Industry and Trade Inc.

Ortadoğu Advertisement Presentation Publishing Tourism Education Architecture Industry and Trade Inc. will be pleased to hear your comments about our terms of use. Please share the subjects you think may enrich our website or if there is any problem regarding our website.

info@turkiyeklinikleri.com