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Associations of Voluntary Exercise and Screen Time during the First Wave of COVID-19 Restrictions in Japan with Subsequent Grip Strength among University Students: J-Fit + Study

Author

Listed:
  • Shaoshuai Shen

    (Institute of Health and Sports Science & Medicine, Juntendo University, 1-1 Hiraka-gakuendai, Inzai 270-1695, Japan
    These two authors equally contributed to this work.)

  • Koya Suzuki

    (Graduate School of Health and Sports Science, Juntendo University, 1-1 Hiraka-gakuendai, Inzai 270-1695, Japan
    These two authors equally contributed to this work.)

  • Yoshimitsu Kohmura

    (Graduate School of Health and Sports Science, Juntendo University, 1-1 Hiraka-gakuendai, Inzai 270-1695, Japan)

  • Noriyuki Fuku

    (Graduate School of Health and Sports Science, Juntendo University, 1-1 Hiraka-gakuendai, Inzai 270-1695, Japan)

  • Yuki Someya

    (Graduate School of Health and Sports Science, Juntendo University, 1-1 Hiraka-gakuendai, Inzai 270-1695, Japan)

  • Eri Miyamoto-Mikami

    (Graduate School of Health and Sports Science, Juntendo University, 1-1 Hiraka-gakuendai, Inzai 270-1695, Japan)

  • Dandan Ke

    (Graduate School of Health and Sports Science, Juntendo University, 1-1 Hiraka-gakuendai, Inzai 270-1695, Japan)

  • Shuich Machida

    (Graduate School of Health and Sports Science, Juntendo University, 1-1 Hiraka-gakuendai, Inzai 270-1695, Japan)

  • Kazuhiro Aoki

    (Graduate School of Health and Sports Science, Juntendo University, 1-1 Hiraka-gakuendai, Inzai 270-1695, Japan)

  • Hisashi Naito

    (Graduate School of Health and Sports Science, Juntendo University, 1-1 Hiraka-gakuendai, Inzai 270-1695, Japan)

Abstract

This study aimed to examine the combined effect of voluntary exercise and screen time during the first wave of the coronavirus disease 2019 (COVID-19) restrictions on subsequent grip strength among health and sports science students in Japan. The participants performed grip strength tests and had their weight assessed on 21 October 2020. Furthermore, they completed an online survey between 21 October and 28 October 2020, which included participants’ current age, height, voluntary exercise, and screen time during the first wave of the COVID-19 pandemic (April and May 2020). In total, 380 participants provided complete data (mean age ± standard deviation [SD]: 18.8 ± 0.6 years; 233 males). Our results revealed that 87.6% of male students and 84.4% of female students performed voluntary exercise >1 day/week during the first wave of the pandemic. Moreover, 21.5% of male students and 23.1% of female students had >8 h/day of screen time. A trend toward greater grip strength was observed for both male and female students with high voluntary exercise and low screen time. In particular, grip strength ( p < 0.05) was significantly greater in male students with high voluntary exercise and low screen time than those with low voluntary exercise and high screen time. In conclusion, this study revealed that during the first wave of COVID-19 restrictions, a combination of high voluntary exercise and low screen time positively affected the subsequent grip strength of health and sports science students.

Suggested Citation

  • Shaoshuai Shen & Koya Suzuki & Yoshimitsu Kohmura & Noriyuki Fuku & Yuki Someya & Eri Miyamoto-Mikami & Dandan Ke & Shuich Machida & Kazuhiro Aoki & Hisashi Naito, 2021. "Associations of Voluntary Exercise and Screen Time during the First Wave of COVID-19 Restrictions in Japan with Subsequent Grip Strength among University Students: J-Fit + Study," Sustainability, MDPI, vol. 13(24), pages 1-9, December.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:24:p:13648-:d:699195
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    References listed on IDEAS

    as
    1. Daniel Duclos-Bastías & Felipe Vallejo-Reyes & Frano Giakoni-Ramírez & David Parra-Camacho, 2021. "Impact of COVID-19 on Sustainable University Sports: Analysis of Physical Activity and Positive and Negative Affects in Athletes," Sustainability, MDPI, vol. 13(11), pages 1-13, May.
    2. Borja Sañudo & Curtis Fennell & Antonio J. Sánchez-Oliver, 2020. "Objectively-Assessed Physical Activity, Sedentary Behavior, Smartphone Use, and Sleep Patterns Pre- and during-COVID-19 Quarantine in Young Adults from Spain," Sustainability, MDPI, vol. 12(15), pages 1-12, July.
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