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最終更新日：2024/10/18
門馬 怜子
モンマ レイコ
(Reiko Momma)
論文
- タイトル
- タイトル（英）
- Consideration on size, velocity and path of droplets emitted during running.
- 参照URL
- https://researchmap.jp/reikomomma6/published_papers/42815785
- 著者
- 著者（英）
- Takako Kuroki,Reiko Momma,Daisuke Hoshi,Sungchan Hong,Nobuyuki Hizawa,Naoki Mukai,Koichi Watanabe,Yoshikazu Okamoto
- 担当区分
- 概要
- 概要（英）
- BACKGROUND: People began to wear face masks during physical activities due to spread of COVID-19. There are no previous studies about the need for wearing masks while running. METHODS: Assuming a citizen runner who runs full marathon in 4 hours, we verified the path and the amount of droplet dispersal, setting a humanoid mannequin with a mask in simulated running environment (Experiment 1). We also had six adults exercise in the same environment to examine droplet behaviors when not wearing a face mask (Experiment 2). Average droplet size was determined, and repeated measures ANOVA was carried out to examine statistical significance. To evaluate observed droplet behaviors, theoretical solutions of the downfall motion of large droplets were then derived, taking air resistance into consideration. RESULTS: Experiment 1: wearing a face mask caused more droplets to adhere to the face; Experiment 2: droplets were emitted in conversation, coughing or sneezing, and they fell within social distancing. Average droplet size was not sensitive to the wind velocity. It could vary with a significant difference for time and wind velocity. Observed velocity and path of droplet can be expressed by the theoretical solutions. CONCLUSIONS: Velocity and path of large droplets can be expressed by the theoretical solution of particles in downfall motion under air resistance. We therefore conclude that wearing a mask while running gives adverse effects in preventing infection. Possibility of droplet transmission while running is considered low even when not wearing a face mask, as long as social distancing is ensured.
- 出版者・発行元
- 出版者・発行元（英）
- 誌名
- 誌名（英）
- The Journal of Sports Medicine and Physical Fitness
- 巻
- 63
- 号
- 10
- 開始ページ
- 1100
- 終了ページ
- 1117
- 出版年月
- 2023年7月10日
- 査読の有無
- 査読有り
- 招待の有無
- 掲載種別
- 研究論文（学術雑誌）
- ISSN
- DOI URL
- https://doi.org/10.23736/S0022-4707.23.14923-1
- 共同研究・競争的資金等の研究課題