Affiliations: [a] Department of Biological Sciences in Sport, Faculty of Sport Sciences and Health, Shahid Beheshti University, Tehran, Iran
| [b] Department of Exercise Physiology, Faculty of Physical Education and Sports Sciences, Alzahra University, Tehran, Iran
| [c] University of Lyon, University Claude Bernard Lyon 1, Interuniversity Laboratory of Human Movement Biology EA7424, “Vascular Biology and Red Blood Cell” Team, Lyon, France
| [d] Labex GR-Ex, Paris, France
Correspondence:
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Corresponding author: Dr. Sajad Ahmadizad, Department of Biological Sciences in Sport, Faculty of Sports Sciences and Health, Shahid Beheshti University, Velenjak, Tehran 1983963113, Iran. Tel: +98 21 29902931; Fax: +98 21 22431953; E-mail: [email protected].
Abstract: BACKGROUND:Platelet activation is associated with abdominal obesity and exercise training is an important modulator of body weight. OBJECTIVE:We investigated the effects of two high intensity interval exercise (HIIE) protocols of different intensity and duration on platelet indices and platelet aggregation in overweight men. METHODS:Ten overweight men performed 6 intervals of 30s exercise at 110% of peak power output (PPO) interspersed by 3 : 30 min active recovery (1/7 protocol) at 40% of PPO and 6 intervals of 2 min exercise at 85% of PPO interspersed by 2 min active recovery (1/1 protocol) at 30% of PPO in two separate sessions. Platelet indices and platelet aggregation were measured before and immediately after both HIIEs. RESULTS:Platelet indices increased significantly following HIIE (P < 0.05), though, significant differences between the two protocols were only detected for platelet count, which was markedly increased following 1/1 protocol. Platelet aggregation increased significantly (P < 0.05) in response to the two HIIE protocols, with no significant difference being observed between the two protocols (P > 0.05). CONCLUSIONS:It is concluded that HIIE leads to transient increases in markers of thrombus formation and that work to rest ratio is an important factor when investigating the changes in thrombocytosis following HIIE.
