| Autor: |
Gurney T; School of Life Sciences, Kingston University, Kingston upon Thames, England.; Division of Surgery & Interventional Science, University College London, London, England., Brouner J; School of Life Sciences, Kingston University, Kingston upon Thames, England., Spendiff O; School of Life Sciences, Kingston University, Kingston upon Thames, England. |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of dietary supplements [J Diet Suppl] 2024; Vol. 21 (1), pp. 99-115. Date of Electronic Publication: 2023 Mar 11. |
| DOI: |
10.1080/19390211.2023.2186557 |
| Abstrakt: |
This study investigated the effects of chlorella supplementation on submaximal endurance, time trial performance, lactate threshold, and power indices during a repeated sprint performance test by fourteen male trained cyclists. Participants ingested 6 g/day of chlorella or placebo for 21-days in a double-blinded randomized counter-balanced cross-over design, with a fourteen-day washout period between trials. Each completed a 2-day testing period comprising a 1-hour submaximal endurance test at 55% external power output max and a 16.1 km time trial (Day-1), followed by a lactate threshold (Dmax) and repeated sprint performance tests (3 X 20 s sprints interspersed by 4-mins) (Day-2). Heart rate (b . min -1 ), RER, V̇O 2 (ml·kg -1 ·min -1 ), lactate and glucose (mmol/L), time (secs), power output (W/kg), and hemoglobin (g/L) were compared across conditions. Following chlorella supplementation (chlorella vs. placebo for each measurement) average lactate and heart rate were significantly lower ( p < 0.05) during submaximal endurance tests (1.68 ± 0.50 mmol/L vs. 1.91 ± 0.65 mmol/L & 138 ± 11b . min -1 vs. 144 ± 10b . min -1 ), average power and peak power (W/kg) were significantly higher during repeated sprint bouts (9.5 ± 0.7 W/kg vs. 9.0 ± 0.7 W/kg & 12.0 ± 1.2 W/kg vs. 11.4 ± 1.4 W/kg), hemoglobin significantly increased (149.1 ± 10.3 g/L) in comparison to placebo (143.4 ± 8.7 g/L) ( p = 0.05). No differences existed between conditions for all oxygen consumption values, 16.1 km time trial measures and lactate threshold tests ( p > 0.05). In conclusion, chlorella may pose as an additional supplement for cyclists to consider, particularly for those cyclists who want to improve their sprinting. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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