A verification experiment was conducted under the supervision of Professor Yoshihiko Koga to investigate the relationship between stroller vibrations and the stress felt by babies.
Professor Yoshihiko Koga
Professor Emeritus of Kyorin University, Chairman of the Japan TMS Research and Training Center
This test showed that the vibrations caused by a stroller moving are transmitted to the baby and cause great stress. Based on these results, when using a stroller, it is important to take into consideration road conditions and driving speed, and to actively take measures to prevent vibrations from being transmitted to the baby. When choosing a stroller, we recommend considering one that is "made of materials that reduce vibrations."
To verify the hypothesis that the vibrations felt by babies when moving in a stroller "may lead to stress," we measured the amylase level in saliva, which indicates the level of stress. We found that the stress caused by the vibrations caused by moving a stroller was about 60% higher than when the baby was at rest in the mother's arms.
Just how stressful is it to ride in a stroller? When we conducted tests using a stroller that did not have Combi's shock-absorbing material "Egg Shock," the stress caused by the stroller's vibrations was about the same as the stress caused by "not being able to see the mother" or "having a dirty diaper."
How much of a difference does the magnitude of vibration make depending on the material used in the stroller? When we tested it using a machine called an "Actigraph" that measures the magnitude of vibration, we found that the vibration of a stroller using "Egg Shock" was about 30% lower than that of a stroller that did not use the material.
We also conducted comparative tests using the same type of stroller to see if the level of stress changes depending on the material used in the stroller.The results showed that strollers using Egg Shock reduced stress by about 40% compared to strollers that did not use the material.
The “Dacco Seat” is an inner cushion that is attached to strollers to support the soft body of a newborn baby. The head part of the seat has an Egg Shock built in, which protects the baby’s head from small vibrations and shocks in case of an accident.
Even small jolts and vibrations, such as when starting or braking, can be a big shock to a baby’s soft head. For this reason, egg shocks are built into the head and back of the seat (depending on the model).
EggShock equipped products
