Author

Jae-Myun Ko

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Open access Sep 2026

Criterion Validity of Smartwatches for Measuring Heart Rate and Energy Expenditure During Resistance Exercise

Commercial smartwatches are increasingly used to monitor physiological responses during exercise; however, their validity for resistance exercise remains uncertain. This study evaluated the criterion validity of four commercial smartwatches (Apple Watch Series 8, Samsung Galaxy Watch 5, Fitbit Charge 5, and Garmin Vivo...

Jung-Hyun Yun, Jae-Myun Ko, Tae-Hyung Lee · Bioengineering · 0 citations

Open access Sep 2026

Effects of morning versus evening high-intensity exercise on electroencephalographic and autonomic responses in middle-aged women

[Purpose] The time of day at which exercise is performed influences physiological responses and performance, and thus its health benefits. This study investigated whether electroencephalographic (EEG) and autonomic nervous system responses to morning versus evening exercise differed in middle-aged women.[Methods] Thirt...

Jae-Myun Ko, Wi-Young So, Jae-Hyun Jung · Physical activity and nutrit... · 0 citations