Response of platelet indicesto concentric and eccentric isokinetic‌ contractions in men

Document Type : Original article

Authors

1 Associate professor, exercise physiology, faculty of health and sport sciences, Shahid Beheshti University,Tehran, Iran.

2 MSc. exercise physiology, faculty of health and sport sciences, Shahid Beheshti ,Tehran, Iran.

3 Professor, exercise physiology, faculty of health and sport sciences, Shahid Beheshti Universityy,Tehran, Iran.

4 Postdoc researcher, faculty of health and sport sciences, Shahid Beheshti University,Tehran, Iran.

5 PhD Student, exercise physiology, Islamic Azad University, Ayatollah Amoli Branch, Amol, Iran.

Abstract

Background and Aim: The previous investigations have showed that isokinetic contractions lead to more pressure on muscles over full range of motion. Also, the type of isokinetic contractions can determine body response. The aim of the present study was to compare the responses of platelet indices to concentric and eccentric isokinetic contractions in men.
Materials and Methods: A total of 10 healthy male individuals (age, 24.2±1.99) voluntarily participated in the study and were invited to laboratory at three separate occasions. The first session was designed for familiarizing the participants with laboratory environment and measuring the anthropometrical characteristics. In the 2nd and the 3rd sessions, participants performed two exercise protocols in a counterbalance manner comprising of four sets of 10 repetitions of CON/CON and ECC/ECC isokinetic contractions in the knee joint with 60s rest between sets. Blood platelet indices including platelet count were measured before and at 0, 15, 30, 45, and 60 minutes after exercise. Data was analyzed using repeated measures of ANOVA (2×6).
Results: Contraction type had no significant effect on PLT and PDW (p>0.05), though, irrespective of the type of contraction, isokinetic exercise had a significant effect (P<0.05). Neither type of contraction nor isokinetic exercise had significant effects on MPV (P>0.05). However, both types of contraction and isokinetic exercise had significant effects on PCT (P>0.05).
Conclusion: Based on the findings of the present study, it is concluded that isokinetic exercise, irrespective of its type (CON or ECC), is effective on platelet indices and that lack of differences between the two contractions types might be due to equality of exercise load.

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References

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The Scientific Journal of Rehabilitation Medicine
Volume 6, Issue 2
July and August 2017
Pages 188-196

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History

  • Receive Date: 15 November 2015
  • Revise Date: 02 July 2016
  • Accept Date: 23 July 2016
  • First Publish Date: 22 June 2017

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