Journal of Physical Therapy Science
Online ISSN : 2187-5626
Print ISSN : 0915-5287
ISSN-L : 0915-5287
Original Article
Changes in muscle strength and endurance of professional cyclists due to PycnoRacerTM
Tatsuya IgawaTsuyoshi HaraMasahiro IshizakaYohei SawayaAkihiro ItoAkihiro YakabiAkira Kubo
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2021 Volume 33 Issue 4 Pages 339-344


[Purpose] Changes in the muscle performance of professional motorized athletes using pycnogenol-containing supplements have not been clarified. The purpose of this study was to evaluate the changes in muscle strength and endurance of professional cyclists during 4 weeks of training with the use of PycnoRacerTM. [Participants and Methods] Eight professional cyclists were requested to consume PycnoRacerTM twice/day for 4 weeks. The muscle endurance test consisted of 50 consecutive knee flexion and extension exercises at 180°/sec using an isokinetic torque machine before and after PycnoRacerTM administration. The athletes’ body composition, including leg muscle mass, was also measured. [Results] The maximum flexor muscle torque and 41st–50th flexion muscle torque values significantly improved after supplement consumption (average improvement of 8.5%; range, 13.3–67.2%). The leg muscle mass and body composition did not differ significantly between the two conditions. The participants showed an average improvement of 31.8% (range, 0.9–67.8%) in their total work with cycling training. No adverse events were observed. [Conclusion] The use of PycnoRacerTM may improve training, muscle strength, and endurance, but not muscle mass.

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© 2021 by the Society of Physical Therapy Science. Published by IPEC Inc.

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