Keep the outcome and population exact
This randomized trial studied an acute caffeine dose and strength or repetition performance in resistance-trained women during a defined menstrual-cycle phase. It did not test endurance time trials or time to exhaustion, despite those automated outcome labels.
The conservative training takeaway is not “take caffeine for every session.” It is that an acute response observed in a specific resistance-training protocol may not transfer to HYROX racing, running, cycling or an individual's tolerance. If caffeine is already appropriate, test a familiar amount well before competition and record sleep, anxiety, gastrointestinal and cardiovascular response.
Confirm participants, dose and outcomes in the PubMed record. Caffeine can interact with health conditions, pregnancy, medication and sleep. Seek individualized guidance where relevant and do not combine unfamiliar stimulant products.