Ryan Wiet - Academia.edu (original) (raw)
Papers by Ryan Wiet
Research Directs in Psychology and Behavior
Introduction: Cell phone use is associated with physical activity and sedentary behavior. These r... more Introduction: Cell phone use is associated with physical activity and sedentary behavior. These relationships have not been assessed in the context of the COVID-19 pandemic. This study assessed the potential effects of pandemic-related restrictions on cell phone use and the possible relationship of altered cell phone use to physical activity, sedentary behavior, and bodyweight. Methods: Participants (N = 307) completed a survey assessing cell phone use, physical activity, sedentary behavior, and bodyweight before and after pandemic restrictions were implemented. Results: Most participants reported increased cell phone use (χ2 = 61.50, p < 0.001). Participants increased sitting by 10 hours/week (F = 25.63, p < 0.001). Those that increased cell phone use reported greater increases in daily sitting (11.65 hours/week, F = 4.14, p = 0.04) than those that did not increase cell use (5.0 hours/week). There was also an increase (F = 10.08, p = 0.002, η2 = 0.04) in reported bodyweigh...
International journal of exercise science, 2020
The COVID-19 pandemic has closed non-essential businesses which may alter individuals' leisur... more The COVID-19 pandemic has closed non-essential businesses which may alter individuals' leisure behaviors. Consequently, physical activity and sedentary behavior may be negatively impacted as many fitness and recreational centers have been closed. This study aimed to examine the impact of the pandemic on physical activity and sedentary behavior in a sample of university students and employees before and after the university cancelled face-to-face classes and closed campus. Participants (N = 398) completed the validated Godin physical activity questionnaire and the International Physical Activity Questionnaire which assessed physical activity and sedentary behavior pre- and post-cancellation of face-to-face classes. Participants were also separated in the groups (low, moderate, high physical activity) based upon a tertile split of pre-pandemic total physical activity. Physical activity group by time ANOVAs were used to assess potential changes in total physical activity and sedent...
Medicine & Science in Sports & Exercise, 2021
Decreases in individuals’ physical activity and increases in sedentary behavior and bodyweight ha... more Decreases in individuals’ physical activity and increases in sedentary behavior and bodyweight have been reported during the COVID-19 pandemic. The present study assessed the ability of physical activity monitoring, which may promote physical activity and discourage sedentary behavior, to mitigate these negative outcomes. An evaluation of university samples (N = 404, 40.5 ± 15.4 years) of self-reported physical activity, sedentary behavior, and bodyweight prior to the closure of campus due to the pandemic in March of 2020 and again at the time of the survey administration (May–June 2020) during pandemic-related restrictions was performed. Participants also reported whether they did (n = 172) or did not (n = 232) regularly use physical activity monitoring technology. While physical activity was unchanged during the pandemic (p ≥ 0.15), participants significantly increased sitting by 67.8 ± 156.6 min/day and gained 0.64 ± 3.5 kg from pre-campus to post-campus closure (p \u3c 0.001). However, the use of activity monitoring did not moderate these changes. In conclusion, while physical activity was not affected, participants reported significant increases in sedentary behavior and bodyweight during the COVID-19 pandemic. These changes occurred regardless of whether participants regularly used physical activity monitoring or no
Medicine & Science in Sports & Exercise, 2020
Medicine & Science in Sports & Exercise, 2020
Various major sporting events in the heat of summer start from not only in the morning but also i... more Various major sporting events in the heat of summer start from not only in the morning but also in the late evening. However, to date rationales for differences in endurance exercise capacity and thermoregulatory responses to exercise in the heat between morning and late evening have not been reported. PURPOSE: The current study investigated the diurnal effects of exercise in the late morning and evening on endurance exercise capacity and thermoregulatory responses during a time-toexhaustion test in the heat. METHODS: Ten male participants cycled at 70% peak oxygen uptake until exhaustion in the heat (30°C, 50% relative humidity). Participants commenced exercise in the late morning at 10:00 h (AM) or evening at 21:00 h (PM). Upon cessation of exercise, participants completed a 30 min post-exercise recovery. RESULTS: Time to exhaustion was 28±13% (mean±SD) longer in PM (49.1±16.3 min) than AM (38.7±14.6 min; P<0.001). Rectal temperature before and during exercise were higher in PM than AM (both P<0.01) in accordance with the diurnal variation of core temperature (Tc). The rates of rise in rectal temperature (AM 0.030±0.012°C/min; PM 0.021±0.008°C/min), mean skin temperature (AM 0.095±0.042°C/min; PM 0.068±0.028°C/min), thermal sensation and rating of perceived exertion during exercise were slower in PM than AM (all P<0.05). Rectal temperature at the point of exhaustion was not different by time-of-day (AM 38.3±0.4°C; PM 38.6±0.5°C). Dry and evaporative heat losses and an increase in skin blood flow during exercise were greater in PM than AM (all P<0.05). During 30-min post-exercise recovery, the rates of fall in rectal temperature (AM 0.013±0.004°C/min; PM 0.019±0.010°C/min) and skin blood flow were faster and thermal sensation was lower in PM than AM (all P<0.05). Heart rate during exercise and recovery were not different between trials. CONCLUSION: This study indicates that endurance exercise capacity is greater and heat-loss responses to control Tc during and following exercise in the heat are more effective in the late evening than morning. Moreover, perceived fatigue during exercise and thermal perception during and following exercise are lower in the late evening than morning.
Medicine & Science in Sports & Exercise, 2020
Medicine & Science in Sports & Exercise, 2020
Medicine & Science in Sports & Exercise, 2019
I would like to acknowledge my Lord and Savior for giving me this opportunity to glorify His name... more I would like to acknowledge my Lord and Savior for giving me this opportunity to glorify His name through this project.
Research Directs in Psychology and Behavior
Introduction: Cell phone use is associated with physical activity and sedentary behavior. These r... more Introduction: Cell phone use is associated with physical activity and sedentary behavior. These relationships have not been assessed in the context of the COVID-19 pandemic. This study assessed the potential effects of pandemic-related restrictions on cell phone use and the possible relationship of altered cell phone use to physical activity, sedentary behavior, and bodyweight. Methods: Participants (N = 307) completed a survey assessing cell phone use, physical activity, sedentary behavior, and bodyweight before and after pandemic restrictions were implemented. Results: Most participants reported increased cell phone use (χ2 = 61.50, p < 0.001). Participants increased sitting by 10 hours/week (F = 25.63, p < 0.001). Those that increased cell phone use reported greater increases in daily sitting (11.65 hours/week, F = 4.14, p = 0.04) than those that did not increase cell use (5.0 hours/week). There was also an increase (F = 10.08, p = 0.002, η2 = 0.04) in reported bodyweigh...
International journal of exercise science, 2020
The COVID-19 pandemic has closed non-essential businesses which may alter individuals' leisur... more The COVID-19 pandemic has closed non-essential businesses which may alter individuals' leisure behaviors. Consequently, physical activity and sedentary behavior may be negatively impacted as many fitness and recreational centers have been closed. This study aimed to examine the impact of the pandemic on physical activity and sedentary behavior in a sample of university students and employees before and after the university cancelled face-to-face classes and closed campus. Participants (N = 398) completed the validated Godin physical activity questionnaire and the International Physical Activity Questionnaire which assessed physical activity and sedentary behavior pre- and post-cancellation of face-to-face classes. Participants were also separated in the groups (low, moderate, high physical activity) based upon a tertile split of pre-pandemic total physical activity. Physical activity group by time ANOVAs were used to assess potential changes in total physical activity and sedent...
Medicine & Science in Sports & Exercise, 2021
Decreases in individuals’ physical activity and increases in sedentary behavior and bodyweight ha... more Decreases in individuals’ physical activity and increases in sedentary behavior and bodyweight have been reported during the COVID-19 pandemic. The present study assessed the ability of physical activity monitoring, which may promote physical activity and discourage sedentary behavior, to mitigate these negative outcomes. An evaluation of university samples (N = 404, 40.5 ± 15.4 years) of self-reported physical activity, sedentary behavior, and bodyweight prior to the closure of campus due to the pandemic in March of 2020 and again at the time of the survey administration (May–June 2020) during pandemic-related restrictions was performed. Participants also reported whether they did (n = 172) or did not (n = 232) regularly use physical activity monitoring technology. While physical activity was unchanged during the pandemic (p ≥ 0.15), participants significantly increased sitting by 67.8 ± 156.6 min/day and gained 0.64 ± 3.5 kg from pre-campus to post-campus closure (p \u3c 0.001). However, the use of activity monitoring did not moderate these changes. In conclusion, while physical activity was not affected, participants reported significant increases in sedentary behavior and bodyweight during the COVID-19 pandemic. These changes occurred regardless of whether participants regularly used physical activity monitoring or no
Medicine & Science in Sports & Exercise, 2020
Medicine & Science in Sports & Exercise, 2020
Various major sporting events in the heat of summer start from not only in the morning but also i... more Various major sporting events in the heat of summer start from not only in the morning but also in the late evening. However, to date rationales for differences in endurance exercise capacity and thermoregulatory responses to exercise in the heat between morning and late evening have not been reported. PURPOSE: The current study investigated the diurnal effects of exercise in the late morning and evening on endurance exercise capacity and thermoregulatory responses during a time-toexhaustion test in the heat. METHODS: Ten male participants cycled at 70% peak oxygen uptake until exhaustion in the heat (30°C, 50% relative humidity). Participants commenced exercise in the late morning at 10:00 h (AM) or evening at 21:00 h (PM). Upon cessation of exercise, participants completed a 30 min post-exercise recovery. RESULTS: Time to exhaustion was 28±13% (mean±SD) longer in PM (49.1±16.3 min) than AM (38.7±14.6 min; P<0.001). Rectal temperature before and during exercise were higher in PM than AM (both P<0.01) in accordance with the diurnal variation of core temperature (Tc). The rates of rise in rectal temperature (AM 0.030±0.012°C/min; PM 0.021±0.008°C/min), mean skin temperature (AM 0.095±0.042°C/min; PM 0.068±0.028°C/min), thermal sensation and rating of perceived exertion during exercise were slower in PM than AM (all P<0.05). Rectal temperature at the point of exhaustion was not different by time-of-day (AM 38.3±0.4°C; PM 38.6±0.5°C). Dry and evaporative heat losses and an increase in skin blood flow during exercise were greater in PM than AM (all P<0.05). During 30-min post-exercise recovery, the rates of fall in rectal temperature (AM 0.013±0.004°C/min; PM 0.019±0.010°C/min) and skin blood flow were faster and thermal sensation was lower in PM than AM (all P<0.05). Heart rate during exercise and recovery were not different between trials. CONCLUSION: This study indicates that endurance exercise capacity is greater and heat-loss responses to control Tc during and following exercise in the heat are more effective in the late evening than morning. Moreover, perceived fatigue during exercise and thermal perception during and following exercise are lower in the late evening than morning.
Medicine & Science in Sports & Exercise, 2020
Medicine & Science in Sports & Exercise, 2020
Medicine & Science in Sports & Exercise, 2019
I would like to acknowledge my Lord and Savior for giving me this opportunity to glorify His name... more I would like to acknowledge my Lord and Savior for giving me this opportunity to glorify His name through this project.