Rhodiola Rosea: A Stimulant-Free Pre-Workout for Hard Cardio?
A 2013 crossover trial found that a single 3 mg/kg dose of Rhodiola rosea an hour before a 6-mile bike time trial shaved the finish time from 25.8 to 25.4 minutes. Warm-up heart rate dropped from 140 to 136 bpm, and perceived exertion fell from 6.6 to 6.0. The gain is small, around 1.5%, and comes from only 18 people, so it's no miracle. Still, the effort-perception angle makes it an intriguing stimulant-free option for endurance athletes. Here's what the data show and how to try it sensibly.
200 mg of Rhodiola Bought Lifters 24 Extra Seconds. Then Four Weeks of Daily Dosing Added Nothing
A single 200 mg dose of Rhodiola rosea taken an hour before exercise nudged time to exhaustion from 16.8 to 17.2 minutes and raised VO2peak in a double-blind crossover trial. The twist is that four weeks of daily dosing didn't build on that effect or change any measured variable. The gain was small, about 24 seconds, and strength, reaction time and attention didn't budge. Here is what the study actually found, who might try an acute dose, and why you shouldn't count on "loading" rhodiola.