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    Effects of ribose supplementation on anaerobic performance, plasma pH, lactate, ammonia and inorganic phosphate levels
    (Ios Press, 2012) Yaman, Meltem; Colakoglu, Muzaffer; Turgay, Faruk; Ozkol, Zeki; Aksit, Tolga; Ozkaya, Ozgur; Yapicioglu, Bulent
    The purpose of this study was to estimate the effects of ribose supplementation on interval anaerobic performance and fatiguing substance concentrations. The study cohort consisted of physically active, young male volunteers (n = 15). With a double-blind cross over study design, each participant completed two all-out anaerobic exercise sessions, one week apart, one by supplementing maltodextrine and the other by supplementing ribose (150 mg/kg in each test). Two repetitions of 30-s maximal performance with a 4-min interval were completed. Blood samples were taken at rest and five minutes after the second sprint repetition. Neither the biochemical parameters: pH (-0.32 +/- 0.09 vs. -0.26 +/- 0.11), lactate (La) (13.8 +/- 1.9 vs. 13.3 +/- 2.7 mM, ammonia (423 +/- 190 vs. 404 +/- 166 mu mol/L), inorganic phosphate (Pi) (0.68 +/- 0.53 vs. 0.72 +/- 0.63 mM) nor the anaerobic output (746.2 +/- 82.5 vs. 760.2 +/- 86.8 watts) were affected by placebo and ribose supplementations significantly (p > 0.05). In conclusion, based on this protocol, anaerobic performance and/or biochemical status are not affected by ribose supplementation.
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    Effects of system training on finger-grip strength and endurance in sport climbers
    (Edizioni Minerva Medica, 2021) Ceyhan, Gamze; Aksit, Tolga; Vural, Faik; Varol, Rana; Kose, Damla E.; Ozkol, Zeki
    BACKGROUND: This study aims to determine the effect of a 4-week system training (ST) regimen on finger-grip strength and endurance in sport climbers. The ST method works on improving the main grip types in climbing by training in an isolated and symmetrical way. METHODS: In this study, 24 recreational climbers were selected as participants and randomly allocated to an ST group (N.=12) or a control group (CON, N.=12) for the 4-week-long training regimen. The isometric maximal voluntary contraction (MVC) test using a climbing-specific apparatus was performed to determine the maximum finger flexor strength for the dominant (D) and non-dominant (ND) hands. Intermittent finger hang (IFH) and dead-hang (DH) tests were performed on three different grips by using a hangboard to assess finger flexor endurance before and after the training sessions. RESULTS: A significant increase was observed in the MVC for the ST group (20.1%, P<0.05), but not in the CON group (6.2%, P=0.24). The ST group showed significant increases for all parameters in endurance tests (IFH, 20.9 s; DHcrimp, 9.3 s; DHpinch, 7.1 s; DHslope, 11.2 s P<0.05). CONCLUSIONS: The 4-week ST regimen is a highly effective training method for improving grip strength and endurance in sport climbing.