SLEEP – EXERCISE & SUN EXPOSURE


1 RESEARCH ARTICLE


EFFECTS OF EXERCISE WITH OR WITHOUT LIGHT EXPOSURE ON SLEEP QUALITY AND HORMONE RESPONSES – 2014


Lee H1, Kim S1, Kim D2.
METHODS
– College-aged males (N = 10) without any physical problems or sleep disorders performed 4 protocols:
(A) only sun exposure (for 30 minutes, EG1)
(B) only aerobic exercise (walking and jogging for 30 minutes, EG2)
(C) aerobic exercise with sun exposure (EG3)
(D) control (no exercise and no sun exposure, EG4)
– Each protocol was 5x/wk with one-week break (wash-out period) between protocols
– Total test period was 7 weeks (one week of protocol and one week of break)
– Before and after each aerobic exercise session, subjects completed stretching to warm up for 5 to 10 min
RESULTS
(1) Bedtime of EG4 was significantly later than that of the EG1 or EG3
(2) Wake-up time in the EG4 was significantly later than that of the EG1 or the EG3
(3) Sleep onset latency in the EG4 was longer than that of the EG3
(4) The quality of sleep in the EG4 was lower than that of the EG3
(5) Sleep cycle in the EG4 was significantly shorter than that of the EG1
(6) Blood melatonin concentrations of the EG3 was significantly higher than that of the EG4
(7) There were no significant differences in blood concentrations of cortisol, epinephrine, or norepinephrine among protocols, with the order from the lowest to the highest values of EG1 < EG2 < EG3 < EG4
CONCLUSION
– The present data found that EG1 and EG3 showed positive sleep-related hormonal responses, sleep habits, and quality of sleep, indicating that sun exposure or exercise with sun exposure may improve the physical status and quality of life


 

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