Hypothesis
Short-term exposure to a body-worn 2.45 GHz wireless body area network, radiated by textile monopole or patch antennas, would alter the wearer's body temperature, blood pressure, heart rate or sense of well-being.
What failed
In a counterbalanced, crossover, single-blind experiment with both antenna topologies, the measured physiological parameters and well-being did not differ significantly from control; the null hypothesis of no effect was not rejected.
Broken assumption
Wearing an active 2.45 GHz body-area-network antenna measurably changes the wearer's physiology or well-being over the short term.
Why
The paper reports the null without proposing a mechanism, and the abstract's statistical description is partly garbled in the indexed text.
From the published paper: Masrakin et al. IEEE Access, 2019. ↗CC BY