Cutting Weight Wrecks Your Gut. A Probiotic Cut Leaky-Gut Markers
Rapid pre-fight weight cuts are notorious for wrecking digestion, and a new randomized trial suggests a probiotic may help. In 24 elite male combat athletes, four weeks of a complex sports probiotic taken twice daily reduced GI symptoms and lowered zonulin, I-FABP, and D-lactate compared with placebo. The probiotic group also had higher SIgA, lower inflammation, and more butyrate-producing bacteria. The study is small, uses a multi-strain product, and reports no performance data, so the findings are promising rather than definitive. Here is what the trial showed and how fighters might apply it.
Low-Dose Caffeine Coffee Gave Elite Fighters Zero Sprint Boost
Think your pre-workout coffee is supercharging your sprints? A new randomized, double-blind crossover trial in 15 national-level combat athletes found no performance benefit from caffeine doses of 1.5 and 3 mg/kg, about 100 and 200 mg for a 68 kg athlete. Peak power, mean power, fatigue index and even estimated energy system contributions did not differ from decaf. But this is a small null result, not proof that caffeine fails, and most positive studies use capsules at 3–6 mg/kg. Here is the dose math, the caveats and what to actually do before your next hard session.