We wanted to scientifically verify the intuitive findings of the Finnflier’s characteristics – that it is demanding of flight skills and easy on the arm. We worked with noted biomechanist, Steve Leigh, PhD., of Montclair State University, to produce a short study investigating these concepts.
What Throwers Are Saying
Many Finnflier™ users have reported on how they have to throw it right to get it to fly. This means:
1. The arm must be delayed in the throw – a classic point of javelin technique.
2. The power must be applied very closely along the javelin shaft – often called “Throwing through the point”. Many throwers report that they need to be very careful to accomplish this.
The other consistent comments talk about how the Finnflier™ is “easy on the arm”. Of course this is a valuable characteristic. It allows a lot of flight training throws without so much risk of injury.
What The Study Showed
This study revealed that these reports from throwers are supported by careful measurements.
The Finnflier™ is 4 times easier to bump off of the flight line than an 800 gram javelin, which means the thrower must have a very steady hand and delivery path. This makes the 800 gram men’s javelin and the 600 gram women’s javelin feel much steadier and easier to throw through the point.
The load on the arm and shoulder was measured to be twofold less than the 800 gram javelin, which means that the sense of there being less load is actually accurate. Combined with its revealing flight characteristics, it adds up to an implement that shows you just how you threw it and gives you many chances to learn good flights.
EVALUATING THE EFFECTS OF JAVELIN DESIGN ON JOINT FORCES AND TORQUES AND THE CONTROL OF THE RELEASE Leigh, S1, Atwood, D2, and Leonardis, T1 1Department of Exercise Science and PE, Montclair State University, Montclair, NJ USA 2 Pocket Videos LLC, Kenmore, WA USA The conclusions of this study were: The decreased moment of inertia of the Finnjav™ allows for training sessions with reduced risk of upper extremity injury, and a greater focus on control of the release. To read the abstract, follow the link below. Leigh&Atwood_JavelinMoI_ISSSAbstract_20140430