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

Centre Hospitalier Universitaire de Saint Etienne23 enrolled

Overview

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.

Study Type

INTERVENTIONAL

Allocation

Purpose

OTHER

Masking

NONE

Enrollment

Conditions

Sedentary Behavior

Interventions

Sprint Interval TrainingOTHER

The Sprint Interval Training (SIT) training consists of 3 successive blocks of 5 training sessions each. The sessions are 24 to 48 hours apart. . One block lasts two weeks. After the end of one block, the following block begins the day after. The Sprint Interval Training lasts 6 weeks. Each session consists of a series of sprints, the number of which varies from 8 to 14. Thus a session will last from 30 to 45 min approximately So, the time frame of this study is Baseline, Block 1, Block 2 and Block 3 (Not in day or week or month)

Eligibility

Sex: ALLMin age: 18 YearsMax age: 40 YearsHealthy volunteers:

Medical Language ↔ Plain English

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

Locations (1)

CHU de Saint-Etienne

Saint-Etienne, France

Outcomes

Primary Outcomes

oxygen uptake (VO2max) - ml/min/kg

consumption oxygen uptake (VO2max) measured on a cycle ergometer The main objective is to determine at which time frame of sprint interval training blocks, the endurance performance (VO2max) is best.