Factors affecting peak impact force during soccer headers and implications for the mitigation of head injuries
Fig 4
Cotter’s Method sensitivity analysis considering a mass range of 0.3969—0.4797 kg, diameter range of 0.2041–0.2208 m, inflation pressures between 58.6 and 111.7 kPa, and a velocity range of 15-30 m/s.
The most important parameter was the ball velocity, but it should be noted that ball pressure exhibited a sensitivity value near the critical threshold of 0.25.