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Katrien De Bock, Bert O. Eijnde, Monique Ramaekers, and Peter Hespel

Purpose:

The purpose of this study was to investigate the effect of acute and 4-week Rhodiola rosea intake on physical capacity, muscle strength, speed of limb movement, reaction time, and attention.

Methods:

PHASE I: A double blind placebo-controlled randomized study (n = 24) was performed, consisting of 2 sessions (2 days per session). Day 1: One hour after acute Rhodiola rosea intake (R, 200-mg Rhodiola rosea extract containing 3% rosavin + 1% salidroside plus 500 mg starch) or placebo (P, 700 mg starch) speed of limb movement (plate tapping test), aural and visual reaction time, and the ability to sustain attention (Fepsy Vigilance test) were assessed. Day 2: Following the same intake procedure as on day 1, maximal isometric knee-extension torque and endurance exercise capacity were tested. Following a 5-day washout period, the experimental procedure was repeated, with the treatment regimens being switched between groups (session 2). PHASE II: A double blind placebo-controlled study (n = 12) was performed. Subjects underwent sessions 3 and 4, identical to Phase I, separated by a 4-week R/P intake, during which subjects ingested 200 mg R/P per day.

Results:

PHASE I: Compared with P, acute R intake in Phase I increased 0 < -05) time to exhaustion from 16.8 ± 0.7 min to 17.2 ± 0.8 min. Accordingly, VO2peak (p < .05) and VCO2peak(p< .05) increased during R compared to P from 50.9 ± 1.8 ml • min-1 • kg−1 to 52.9 ± 2.7 ml • min-1 • kg"’ (VO2peak) and from 60.0 ± 2.3 ml • min-1 • kg-’ to 63.5 ± 2.7 ml • min-1 kg-1 (VCO2peak). Pulmonary ventilation (p = .07) tended to increase more during R than during P(P: 115.9±7.7L/min; R: 124.8 ± 7.7 L/min). All other parameters remained unchanged. PHASE II: Four-week R intake did not alter any of the variables measured.

Conclusion:

Acute Rhodiola rosea intake can improve endurance exercise capacity in young healthy volunteers. This response was not altered by prior daily 4-week Rhodiola intake.

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Thomas B. Walker and Robert A. Robergs

Rhodiola rosea is an herb purported to possess adaptogenic and ergogenic properties and has recently been the subject of increased interest. The purpose of this article was to review and summarize recent investigations of the potential performance-enhancing properties of Rhodiola rosea. Such studies have generated equivocal results. Several investigations conducted in Eastern Europe have indicated that Rhodiola rosea ingestion may produce such positive effects as improved cognitive function and reduced mental fatigue. Other research from this region has illustrated enhanced endurance exercise performance in both humans and rats. Studies conducted in Western Europe and in North America have indicated that Rhodiola rosea may possess substantial antioxidant properties but have produced mixed results when attempting to demonstrate an ergogenic effect during exercise in humans.

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Anna Skarpanska-Stejnborn, Lucja Pilaczynska-Szczesniak, Piotr Basta, and Ewa Deskur-Smielecka

The aim of this study was to investigate the effect of Rhodiola rosea supplementation on the balance of oxidants and antioxidants in the serum and erythrocytes of competitive rowers. This double-blinded study included 22 members of the Polish Rowing Team who were participating in a preparatory camp. Participants were randomly assigned to the supplemented group (n = 11), who received 100 mg of R. rosea extract twice daily for 4 wk, or the placebo group (n = 11). At the beginning and end of the study, participants performed a 2,000-m maximum test on a rowing ergometer. Blood samples were taken from the antecubital vein before each exercise test, 1 min after completing the test, and after a 24-hr restitution period. The following redox parameters were assessed in erythrocytes: superoxide dismutase activity, glutathione peroxidase activity, and thiobarbituric-acid-reactive substances concentrations. In addition, creatine kinase activity and total antioxidant capacity were measured in plasma samples, lactate levels were determined in capillary blood samples, and uric acid concentrations were measured in serum. After supplementation, the total plasma antioxidant capacity was significantly higher (p = .0002) in the supplemented group than in the placebo group, and superoxide dismutase activity in erythrocytes directly after and 24 hr after the ergometry was significantly (p = .0461) lower in athletes receiving R. rosea extracts than in the placebo group. In conclusion, supplementation with R. rosea increased antioxidant levels in the plasma of professional rowers but had no effect on oxidative damage induced by exhaustive exercise.

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. Faigenbaum * 4 2009 19 19 2 2 172 172 185 185 10.1123/ijsnem.19.2.172 The Influence of Supplementation with Rhodiola rosea L . Extract on Selected Redox Parameters in Professional Rowers Anna Skarpanska-Stejnborn * Lucja Pilaczynska-Szczesniak * Piotr Basta * Ewa Deskur-Smielecka * 4 2009 19 19 2 2

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.3.272 Bone Mineral Density in Young Active Females: The Case of Dancers Mary Yannakoulia * Antonios Keramopoulos * Antonia-Leda Matalas * 6 2004 14 14 3 3 285 285 297 297 10.1123/ijsnem.14.3.285 Acute Rhodiola Rosea Intake Can Improve Endurance Exercise Performance Katrien De Bock * Bert O. Eijnde

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Determination of Subcutaneous Body Fat Percentage by Measuring Skinfold Thickness in Teenagers in Turkey Vatan Kavak * 6 2006 16 16 3 3 296 296 304 304 10.1123/ijsnem.16.3.296 Does Rhodiola Rosea Possess Ergogenic Properties? Thomas B. Walker * Robert A. Robergs * 6 2006 16 16 3 3 305 305 315 315 10

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Romain Meeusen and Lieselot Decroix

)     +   75 mg Haskell et al. ( 2007 )     +   222 mg Veasey et al. ( 2015 ) + ↓ perception of effort + Rhodiola rosea 3 mg/kg Noreen et al. ( 2013 ) + ↓ perception of effort /   200 mg De Bock et al. ( 2004 ) +     Sage 600 mg dried Kennedy et al. ( 2006 )     +   50 µl Tildesley et al. ( 2003 )     +   50