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The effects of 6-week-decoupled bi-pedal cycling on submaximal and high intensity performance in competitive cyclists and triathletes
Institute of Training Science and Sport Informatics, German Sport University, Köln, Germany.
German Research Centre of Elite Sport, Köln, Germany .
Institute of Sportscience and Sport, University of Nürnberg-Erlangen, Erlangen, Germany .
Institute of Training Science and Sport Informatics, German Sport University, Köln, Germany.
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2011 (English)In: European Journal of Applied Physiology, ISSN 1439-6319, E-ISSN 1439-6327, Vol. 111, no 8, 1625-1630 p.Article in journal (Refereed) Published
Abstract [en]

Aim of this work was to examine the effects of decoupled two-legged cycling on (1) submaximal and maximal oxygen uptake, (2) power output at 4 mmol L-1 blood lactate concentration, (3) mean and peak power output during high intensity cycling (30 s sprint) and (4) isometric and dynamic force production of the knee extensor and flexor muscles. 18 highly trained male competitive male cyclists and triathletes (age 24 ± 3 years; body height 179 ± 11 cm; body mass 78 ± 8 kg; peak oxygen uptake 5,070 ± 680 mL min-1) were equally randomized to exercise on a stationary cycle equipped either with decoupled or with traditional crank system. The intervention involved 1 h training sessions, 5 times per week for 6 weeks at a heart rate corresponding to 70% of VO2peak. VO2 at 100, 140, 180, 220 and 260 and power output at 4 mmol L-1 blood lactate were determined during an incremental test. VO2peak was recorded during a ramp protocol. Mean and peak power output were assessed during a 30 s cycle sprint. The maximal voluntary isometric strength of the quadriceps and biceps femoris muscles was obtained using a training machine equipped with a force sensor. No differences were observed between the groups for changes in any variable (P = 0.15-0.90; effect size = 0.00-0.30). Our results demonstrate that a 6 week (30 sessions) training block using decoupled crank systems does not result in changes in any physiological or performance variables in highly trained competitive cyclists.

Place, publisher, year, edition, pages
2011. Vol. 111, no 8, 1625-1630 p.
Keyword [en]
Blood lactate; Cycling; Heart rate; High intensity; Oxygen uptake; Performance
National Category
Sport and Fitness Sciences
Identifiers
URN: urn:nbn:se:miun:diva-12295DOI: 10.1007/s00421-010-1785-zISI: 000293980000008Scopus ID: 2-s2.0-80053916323OAI: oai:DiVA.org:miun-12295DiVA: diva2:372527
Projects
Integrative Physiology & BiomechanicsInnovative Biomechanical Olympic Performance Technology (OPT)
Available from: 2010-11-25 Created: 2010-11-25 Last updated: 2011-12-12Bibliographically approved

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Holmberg, Hans-Christer
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