Copyright © 2019. The Authors. Published by Elsevier Ltd. All rights reserved. In this study, an experiment is conducted to evaluate a squat motion while using the wearable variable viscoelastic assistive suit “Airsist I,” and the assistive effect of the suit is confirmed. Wearable assistive suits help in reducing the burden on laborers. Airsist I was developed in a previous study, based on the characteristics of variable viscoelasticity. In addition, a variable viscoelastic control strategy was proposed. However, an evaluation has not been performed to confirm the assistive effect of Airsist I. Therefore, this study reports on the confirmation of the assistive effect of the variable viscoelastic suit Airsist I.