Does a Multi-ingredient Pre-workout Supplement Enhance Cycling Time Trial Performance?

Exclusion criteria: * Any diagnosed metabolic health condition * Pregnant * Non-habitual caffeine intake * Smoker * No endurance training * Diagnosed Cardiovascular disease * Recent history of musculoskeletal injury * Anti-depressant and anti-anxiety medication Inclusion criteria * Age 18-40 * Healthy * Highly trained endurance athletes (V̇O2max: males \>55 and females \>50 mL⋅kg bm-1⋅min-1) * Both males and females are allowed to participate. If females are on the oral contraceptive pill they are to be tested on consecutive weeks. If they are not on the oral contraceptive pill, then female subjects are to be tested every 4 weeks, at the same point of their menstrual cycle.