Podcast Episode #29: How Many Critters Are Living In YOUR Gut, Making You Fat, Tired, Lazy, Bloated and Sick? (hint: more than you think)

29 Jan 2026 · 54 min
Episode

29 Jan 2026 · 54 min

0:00

Ben Greenfield and Dr. Ann Louise Gittleman discuss gut parasites and digestive health's effect on athletic performance. They cover colon-cleansing methods, the role of probiotics and digestive enzymes, and foods like pumpkin seeds and garlic for circulation. The episode also reviews strength and endurance research, including how caffeine at 3-6 mg/kg improves time-trial performance.

Questions this episode answers

Episode #29, 2011-10-23.

Approximately 3–6 mg per kilogram of body mass (taken ~30–45 minutes prior).

1 minute vs 2.5 minutes rest between sets; 1-minute rest produced a larger acute hormonal response (growth hormone, catecholamines) and similar strength gains, but differences diminished after ~5 weeks.

Runners wearing compression socks averaged about 0.5 miles/hour faster and lasted ~1.5 minutes longer on average than non-wearers (per the episode summary).

The episode reported an average ~9 beats per minute difference between cycling and running heart-rate zones and recommended sport-specific testing (separate tests for bike and run) and, if possible, using power (watts) over heart rate for measuring intensity.

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