Related Experiment Video
Updated: Aug 6, 2025

A Real-World High-Intensity Interval Training Protocol for Cardiorespiratory Fitness Improvement
Published on: February 22, 2022
Changes in power-force-velocity profile induced by 2 weeks of sprint interval training
Jaume Lloria-Varella1, Jérémy Rossi2, Jean-Benoît Morin2
1Laboratoire Interuniversitaire de Biologie de la Motricité, Université Jean Monnet Saint-Étienne, Lyon1, Université Savoie Mont-Blanc, Saint Etienne, France - jaume.lloria.varella@univ-st-etienne.fr.
Background:
This study aimed to determine the effects of a running sprint interval training protocol (R-SIT) on the sprint acceleration mechanical properties and jump performance. Eleven young male basketball players performed 6 R-SIT sessions for 2 weeks.
Methods:
Each session consisted of 30-second running bouts repeated 4 to 7 times interspersed by 4 minutes of recovery. Performance was assessed from the individual power-force-velocity profiles (PVFP) over a 20-m sprint and from a countermovement jump at baseline (PRE) and after two weeks of training (POST).
Results:
Sprint time decreased by 2% over the first 5 and 10 meters (P<0.01) while no significant changes in the time at 20 meters (-0.8%, P=0.09) nor in maximal velocity (-1%, P=0.31) were detected. The average PFVP showed an increase in theoretical maximal force and power output of 5 and 4%, respectively (P<0.05), with no change in theoretical maximal speed (P=0.26). Jump height and power also increased after training (5 and 3% respectively, P<0.01). Players improved their maximal sprint distance covered during the 30-second bouts and became more fatigue-resistant to long sprint events.
Conclusions:
Six sessions of R-SIT helped to enhance short sprint times, acceleration and power output.
More Related Videos
Related Concept Videos
Power Expended by a Constant Force
Exercise and Muscle Performance
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
Instantaneous Power
Muscle Stimulation Frequency
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Velocity Potential
Velocity and Position by Graphical Method

