
The team developed an ingestible electronic capsule to monitor gas levels in the human gut. When it's paired with a pocket-sized receiver and a mobile phone app, the pill reports tail-wind conditions in real time as it passes from the stomach to the colon. [...] Such fume data could clarify the conditions of each section of the gut, what microbes are up to, and which foods may cause problems in the system. Until now, collecting such data has been a challenge. Methods to bottle it involved cumbersome and invasive tubing and inconvenient whole-body calorimetry.
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Finally!
This news made the local running magazine possibly answering the question of what one should or should not eat prior to a long race in order to avoid an untimely stop during the race.
"Inconvenient" whole-body calorimetry, but not inconvenient invasive tubing.