Sprint Interval Training on the Endurance, Strength and Velocity Capacities of Healthy Sedentary Subjects

Sprint Interval Training (SIT) on the Endurance, Strength and Velocity Capacities of Healthy Sedentary Subjects

The present study aims to analyse first, the acute effects generated by a single bout of Sprint Interval Training (SIT) and, secondly, the effects of a long-term intervention on sedentary participants.

The main goal is to determine the optimal dose of high-intensity exercise that enhances the best physiological adaptations.

The cumulative effects of SIT, will be assessed by a series of measures placed throughout the time-course (before, after the 1st , the 2nd and the 3rd block of SIT). Those measures consist of physiological measurements (VO2max), neuromuscular capacities (force-velocity profile) the autonomic nervous system responses (heart rate variability) and blood markers (lactate, Creatine phosphoKinase (CK), cytokinases, µRNA). Acute effects will be measured in the familiarisation sessions (after short (8 sprints) and long (14 sprints) sets) by performing a battery of neuromuscular, perceptual, and autonomic nervous system tests before and after the single session of SIT.

Inclusion Criteria:

• untrained healthy (less than 2 hours of sport per week)
• free from muscular, bone or joint injuries
• free from neurologic disease

Exclusion Criteria:

• taking neuroactive substances that can alter corticospinal excitability
• Heart or respiratory failure.
• Subjects who have taken corticosteroids within 3 months (inhalation, infiltration or history of corticosteroid therapy).
• Pregnant woman
• Subject under guardianship