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Dragonfly - 1995 Senior Project, MFA Industrial Design, Konstfack, Stockholm Sweden. The project received the 1995 Intergraph CAD Award and No Pi… Read More
Dragonfly - 1995 Senior Project, MFA Industrial Design, Konstfack, Stockholm Sweden. The project received the 1995 Intergraph CAD Award and No Picnic Award. The project was on display during the 1995 Track&Field World Championships in Gothenbourg, Sweden. Read Less
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Speed and explosivness are key factors in most sports to reach maximum performance. The most effective and natural training method has been proven to be air resistance running. The Dragonfly trainer consists of a winglike foil which unfolds behind the back while running. The size of the foil (i.e. amount of resistance) is easily controlled from the belt while running, folding in/out by a single switch. After use the foil is pulled up into a soft back-holder - for maximum performance - out of the way but ready for  next run.
Dargonfly - Speed Trainer
Wing-foil folded (left) and unfolded (right).
Photo: © Kent Johansson
Dragonfly - Speed Trainer
Close up of back-holder, waist-belt and control.
Photo: © Henrik Jensfelt 
Dragonfly - Speed Trainer
The way it works!
© Henrik Jensfelt 
Dragonfly - Speed Trainer
Wing-foil pulled up into soft back holder.
Photo: © Henrik Jensfelt 
Dragonfly - Speed Trainer
In action!
Photo: © Henrik Jensfelt 
Dragonfly - Speed Trainer
More action!
Photo: © Henrik Jensfelt