Jidovtseff ICST2016 PneumaticPPT
Jidovtseff ICST2016 PneumaticPPT
Jidovtseff ICST2016 PneumaticPPT
2French National Institute of Sport (INSEP), Research Department, Laboratory Sport, Expertise and Performance, Paris, France
3 University of Nantes, Faculty of Sport Sciences, Laboratory Movement, Interactions, Performance, Nantes, France
Introduction
• Aim of resistance training
– Develop muscles specifically
– Improve athletic performance
• Limits of traditional free weight resistance
training
– Force needed to initiate the movement
– Low velocity at the beginning of the movement
– Decrease of force toward the end of movement
• Pneumatic resistance could be an interesting
alternative (Frost et al, 2008)
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Introduction
Bench press
with pneumatic resistance
Not subject to Inertia nor Momentum !!!
Introduction
Pneumatic versus Isoinertial resistance
45% 1RM ballistic
• Limited inertia => lower force to initiate movement => superior velocity.
• Toward the end of movement superior level of force could be maintained.
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Introduction
Pneumatic versus Isoinertial resistance
ballistic
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Methods
15 healthy males subjects
Familiarization 1 Bench press position standardization
Familiarization with pneumatic and
isoinertial resistance
Isoinertial 1RM
Methods
Experimental Design
5 pneumatic/isoinertial ratio
Isoinertial
5 increasing loads
Ramdomized order
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Methods
F-P-V measurements
Rack wires
Pneumatic Force
Methods
F-P-V measurements
Time (s)
Po
V
P = v x Ftotal P
Time (s)
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RESULTS
Difference between
100P and 100I
30% 1RM
RESULTS
Difference between
100P and 100I
30% 1RM
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RESULTS
RESULTS
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CONCLUSION
Kinetics and kinematics patterns are affected by loading type during
ballistic bench press
Pneumatic resistance should be use to :
Enhance velocity development in the initial phase
Increase force toward the end of the movement
Iso-inertial resistance should be used to :
Improve force in the initial phase
Increase velocity toward the end of movement
To favour maximal power output
Influence of the resistance ration on the slope of the force-velocity relationship
Pneumatic loading elicit a FV profile oriented towards velocity vs. a force-
oriented profile for isoinertial loading
The repartition between resistance types can be adapted to meet the specific
demands of each sport
Acknowledgments
Simon AVRILLON
Gaël GUILHEM
François HUG
B.jidovtseff@ulg.ac.be