attey & lin
attey & lin

Test Report

Test report from a 5-time Western Australia State Champion Test report from Footwear & Recreation Technology Research Institute Comparison of “g” factor and energy return
testing testing testing
shoe styles “g” factor (lower is better) energy return% (higher is better)
running shoes 9~15 30~45
sports shoes 12~21 25~48
casual shoes 12~19 30~38
dress shoes 28~42 22~41
Attey & Lin 11.5 67

Test Method

1. the center of front and back sole of the shoe are compressed by the machine.
2. the material elasticity and energy absorption are determined by the compression test.

Test Instructions

The “G” factor represents the ability of energy absorption. A material absorbs more energy and protects our knee from impact when it has a lower “G” factor.

Comparison of different shoe types

Utility=energy return/”g” factor ; higher is better
'energy return' divided by 'g value' ratio average energy return values average g values