Timing of Broccoli Sprout Intake to Improve Exercise Performance

Inclusion Criteria: Healthy, endurance-trained adults aged 18-64 years. Regular endurance training (e.g., cycling/running) and ability to complete a standardized 2-hour high-intensity cycling session on an ergometer. Approved health declaration and screening assessment by study staff (including that ergometer testing can be performed safely). Willing and able to follow the study protocol (diet/fasting instructions, standardized training before visits, attendance at all four laboratory visits). No known allergy/hypersensitivity to ingredients in the broccoli sprout drink or placebo drink. Exclusion Criteria: Does not meet inclusion criteria at screening (e.g., abnormal health declaration or medical findings making intense endurance exercise or muscle biopsy inappropriate). Known allergy/hypersensitivity to ingredients in the intervention or placebo drink (broccoli/cruciferous vegetables or alfalfa) or other relevant food allergy. Ongoing illness, fever, or infection at any test occasion, or other acute medical event judged to affect safety or data quality. Ongoing treatment with medications/supplements judged to affect primary outcomes or increase risk (e.g., anti-inflammatory medication close to test days per study instructions). Pregnancy (if women are included) or breastfeeding. Inability to comply with the study protocol (e.g., failure to standardize diet/fasting, deviating training/alcohol intake despite instructions, or repeated missed visits). Participant withdraws consent or investigator judges continued participation to pose risk. \-