Author

J. M. Letnes

2 papers indexed here

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Oct 2026

eHealth-Guided Exercise Improves Peak Oxygen Uptake and Health-Related Quality of Life After COVID-19: A Randomized Controlled Trial.

PURPOSE Physical activity (PA) levels declined during the COVID-19 pandemic, contributing to reduced fitness and quality of life. eHealth tools may help increase PA. In a six-month randomized controlled trial, we evaluated Activity Quotient (AQ), an innovative eHealth tool designed to promote PA and improve peak oxygen...

E. Eriksen, U. Wisløff, Ottar Brohaug Welde et al. · Medicine & Science in Sports... · 0 citations

Open access Jul 2026

Reliability of short-term measurements of heart rate variability (HRV) in patients with non-permanent atrial fibrillation

Short-term measurements of heart rate variability (HRV) are practical, noninvasive markers of autonomic activity, and reduced HRV has been associated with onset and recurrence of non-permanent atrial fibrillation. However, clinical use is limited by strict standardization requirements and uncertain reliability in cli...

Erlend Flo Lenz, A. Sellevold, J. M. Letnes et al. · Scientific Reports · 0 citations