Blackcurrant extract does not affect the speed-duration relationship during high-intensity running
Anthocyanin-rich blackcurrant extract (BC) has been shown to ergogenically aid high-intensity exercise. Capacity for such exercise is evaluated by the hyperbolic speed-tolerable duration (S-D tol ) relationship. Therefore, in double-blinded and cross-over randomised controlled trials, 15 males under...
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| Published in | European journal of sport science Vol. 21; no. 4; pp. 552 - 561 |
|---|---|
| Main Authors | , , , , , , , |
| Format | Journal Article |
| Language | English |
| Published |
England
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03.04.2021
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| Subjects | |
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| Abstract | Anthocyanin-rich blackcurrant extract (BC) has been shown to ergogenically aid high-intensity exercise. Capacity for such exercise is evaluated by the hyperbolic speed-tolerable duration (S-D
tol
) relationship. Therefore, in double-blinded and cross-over randomised controlled trials, 15 males underwent treadmill running incremental exercise testing and were assessed for S-D
tol
, quantified by critical speed (CS) and D' (distance), and assessments of time to exhaustion performance to empirically test the limits of the S-D
tol
relationship, after daily supplementation of 300 mg/d BC (105 mg/d anthocyanin) or placebo. Supplementation with BC did not change CS (placebo 12.1 ± 1.0 km/h vs BC 11.9 ± 1.0 km/h, p > .05) or D' (placebo 918.6 ± 223.2 m vs BC 965.2 ± 231.2 m, p > .05), although further analysis indicated D' increased in 60% of subject (p = .08), indicating a trend toward cohorts potentially benefiting from BC supplementation. BC supplementation did not change time to exhaustion at or above CS, maximal oxygen uptake (VO
2max
), lactate threshold (LT), submaximal running economy (C
R
), or substrate utilisation during exercise (all p > .05). In conclusion, we could not detect any beneficial effect of BC supplementation during high-intensity running exercise, including the determining factors S-D
tol
relationship, VO
2max
, LT or C
R
. Hence, no ergogenic effect was observed. |
|---|---|
| AbstractList | Anthocyanin-rich blackcurrant extract (BC) has been shown to ergogenically aid high-intensity exercise. Capacity for such exercise is evaluated by the hyperbolic speed-tolerable duration (S-D
tol
) relationship. Therefore, in double-blinded and cross-over randomised controlled trials, 15 males underwent treadmill running incremental exercise testing and were assessed for S-D
tol
, quantified by critical speed (CS) and D' (distance), and assessments of time to exhaustion performance to empirically test the limits of the S-D
tol
relationship, after daily supplementation of 300 mg/d BC (105 mg/d anthocyanin) or placebo. Supplementation with BC did not change CS (placebo 12.1 ± 1.0 km/h vs BC 11.9 ± 1.0 km/h, p > .05) or D' (placebo 918.6 ± 223.2 m vs BC 965.2 ± 231.2 m, p > .05), although further analysis indicated D' increased in 60% of subject (p = .08), indicating a trend toward cohorts potentially benefiting from BC supplementation. BC supplementation did not change time to exhaustion at or above CS, maximal oxygen uptake (VO
2max
), lactate threshold (LT), submaximal running economy (C
R
), or substrate utilisation during exercise (all p > .05). In conclusion, we could not detect any beneficial effect of BC supplementation during high-intensity running exercise, including the determining factors S-D
tol
relationship, VO
2max
, LT or C
R
. Hence, no ergogenic effect was observed. Anthocyanin-rich blackcurrant extract (BC) has been shown to ergogenically aid high-intensity exercise. Capacity for such exercise is evaluated by the hyperbolic speed-tolerable duration (S-D ) relationship. Therefore, in double-blinded and cross-over randomised controlled trials, 15 males underwent treadmill running incremental exercise testing and were assessed for S-D , quantified by critical speed (CS) and ' (distance), and assessments of time to exhaustion performance to empirically test the limits of the S-D relationship, after daily supplementation of 300 mg/d BC (105 mg/d anthocyanin) or placebo. Supplementation with BC did not change CS (placebo 12.1 ± 1.0 km/h vs BC 11.9 ± 1.0 km/h, > .05) or ' (placebo 918.6 ± 223.2 m vs BC 965.2 ± 231.2 m, > .05), although further analysis indicated ' increased in 60% of subject ( = .08), indicating a trend toward cohorts potentially benefiting from BC supplementation. BC supplementation did not change time to exhaustion at or above CS, maximal oxygen uptake (VO ), lactate threshold (LT), submaximal running economy (C ), or substrate utilisation during exercise (all > .05). In conclusion, we could not detect any beneficial effect of BC supplementation during high-intensity running exercise, including the determining factors S-D relationship, VO , LT or C . Hence, no ergogenic effect was observed. Anthocyanin‐rich blackcurrant extract (BC) has been shown to ergogenically aid high‐intensity exercise. Capacity for such exercise is evaluated by the hyperbolic speed–tolerable duration (S–Dtol) relationship. Therefore, in double‐blinded and cross‐over randomised controlled trials, 15 males underwent treadmill running incremental exercise testing and were assessed for S–Dtol, quantified by critical speed (CS) and D’ (distance), and assessments of time to exhaustion performance to empirically test the limits of the S–Dtol relationship, after daily supplementation of 300 mg/d BC (105 mg/d anthocyanin) or placebo. Supplementation with BC did not change CS (placebo 12.1 ± 1.0 km/h vs BC 11.9 ± 1.0 km/h, p > .05) or D’ (placebo 918.6 ± 223.2 m vs BC 965.2 ± 231.2 m, p > .05), although further analysis indicated D’ increased in 60% of subject (p = .08), indicating a trend toward cohorts potentially benefiting from BC supplementation. BC supplementation did not change time to exhaustion at or above CS, maximal oxygen uptake (VO2max), lactate threshold (LT), submaximal running economy (CR), or substrate utilisation during exercise (all p > .05). In conclusion, we could not detect any beneficial effect of BC supplementation during high‐intensity running exercise, including the determining factors S–Dtol relationship, VO2max, LT or CR. Hence, no ergogenic effect was observed. |
| Author | Kemi, Ole J. Spence, Joshua Wilson, John Gillespie, Eric McGrotty, Anton McCloskey, William Pastellidou, Eleni Johnston, Lynsey |
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| Cites_doi | 10.1021/jf050397w 10.3390/nu11102274 10.2174/1381612825666190722100504 10.1371/journal.pone.0076420 10.1080/13590840050134863 10.1046/j.1365-2672.2001.01271.x 10.1093/rheumatology/33.9.847 10.1097/00005768-200201000-00015 10.1021/acs.jafc.8b06737 10.1007/s00421-016-3512-x 10.1007/s00421-004-1279-y 10.1007/s00421-017-3607-z 10.1038/sj.ejcn.1601442 10.1007/s12263-014-0404-8 10.3945/an.110.000042 10.1007/s00421-015-3215-8 10.1007/s00421-018-3858-3 10.3109/19390211.2014.952864 10.1002/ptr.1053 10.3390/sports5030069 10.1249/MSS.0000000000000939 10.1123/ijsnem.2015-0020 10.1152/ajpregu.90740.2008 10.3390/sports5020025 10.1016/j.bbalip.2004.12.014 10.1021/jf030479p 10.3390/nu10111732 10.3390/sports7030067 10.1021/jf034132y 10.1016/j.jnutbio.2013.11.002 10.1123/ijsnem.2018-0088 10.3390/sports4030042 10.1080/17461391.2016.1249524 10.1123/ijsnem.2014-0233 10.1186/1550-2783-11-S1-P2 10.1097/00005768-200001000-00012 10.3390/ijms14047109 10.3389/fnut.2019.00073 10.3389/fnut.2020.00016 |
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| Title | Blackcurrant extract does not affect the speed-duration relationship during high-intensity running |
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