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RISS 인기검색어
- 검색키워드
- 저자 : Lecca, Luigi I. (검색결과 2 건)
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Cardiac Autonomic Control and Neural Arousal as Indexes of Fatigue in Professional Bus Drivers
Lecca, Luigi I.,Fadda, Paolo,Fancello, Gianfranco,Medda, Andrea,Meloni, Michele Occupational Safety and Health Research Institute 2022 Safety and health at work Vol.13 No.2
Background: Bus driving is a mentally demanding activity that requires prolonged attention to ensure safety. The aim of the study was to assess mental fatigue caused by driving a public bus and to find a profile of workers at higher risk. Methods: We evaluated changes of critical flicker fusion (CFF) (index of central arousal) and heart rate variability (HRV) (index of autonomic balance) in a 6-hour driving shift on a real route, in 31 professional bus drivers, and we tested the influence of personal factors such as sleep quality, BMI, and age. Paired t-test was used to test differences of CFF and HRV between both initial and final phase of driving, while multiple linear regression tested the influence of personal variables on the indexes of mental fatigue. Results: Results showed that CFF significantly decreased after 6 hours of bus driving (41.91 Hz, sd 3.31 vs. 41.15 Hz, sd 3.15; p = 0.041), and heart rate significantly decreased in the final phase of driving, with respect to the initial phase (85 vs. 78 bpm, p = 0.027). Increasing age (beta = -0.729, p = 0.022), risk of obstructive sleep apnea syndrome (beta = -0.530, p = 0.04), and diurnal sleepiness (beta = -0.406, p = 0.017) showed a significant effect on influencing mental fatigue. Conclusion: Elderly drivers at higher risk of sleep disorders are more prone to mental fatigue, when exposed to driving activity. Monitoring indexes of central arousal and autonomic balance, coupled with the use of structured questionnaires can represent a useful strategy to detect profile of workers at higher risk of mental fatigue in such duty.
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Fabrício Eduardo Rossi,Anderson Rogério Lecca,Luiz Gustavo Perón Martins,Luciana Sanae Ota Takahashi,Diego Giuliano Destro Christofaro,Luís Alberto Gobbo,Ismael F. Freitas Jr 한국운동재활학회 2017 JER Vol.13 No.3
This study verified the effects of a physical exercise program performed at Basic Healthcare Units on the body composition and functional capacity of women over 50 years old and to compare these variables according to age. Forty-eight women (age, 65.4± 7.3 years) were assessed. The program lasted 20 weeks, and was conducted 2 times per week, 60 min/day. Body mass and height were collected and body mass index (BMI) was calculated. Bioelectrical impedance was used to estimate fat mass and fat free mass. Functional capacities: handgrip test, Timed Up and Go (TUG) test, and Guralnick test were assessment. Weight (68.7± 12.5 [pre]× 66.8± 12.5 [post], P< 0.001), BMI (28.5± 4.1 kg/ m2 [pre]× 27.6± 4.0 kg/m2 [post], P< 0.001), and fat mass (28.4± 7.8 kg [pre]× 26.4± 7.3 kg [post], P< 0.001) were decreased. For functional capacity, handgrip (21.2± 5.8 kg [pre]× 22.9± 6.9 kg [post], P= 0.014), lower limb strength (12.0± 3.0 sec [pre]× 8.5± 2.2 sec [post], P< 0.001), TUG (8.4 ±1.5 sec [pre] ×7.6 ±1.1 se [post], P<0.001) and Guralnik tests (10.6± 1.6 [pre]× 11.8± 0.5 [post], P< 0.001) were improved. 20 weeks of exercise program performed at Basic Healthcare Units decreased body fat and improvement of functional capacity of women over 50 years old and there was difference according to age only on the body composition variables.
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