Experimental design
SECONDARY
The study was a randomized, crossover, single-blind study design in which participants were randomized to ingest a caffeinated chewing gum trial (CAF) and a placebo gum trial (PL) 7 days apart, 10 min before performing the Romanian deadlift on a flywheel training device, CONSORT diagram and study design as shown in Fig. CONSORT diagram and study design.The participants made three visits to the laboratory. During the first visit, participants were familiarized with the exercise tests and the maximum resistance was determined. Following the familiarization visit, participants were randomized in a counterbalanced fashion to two main conditions, PL and CAF. The primary outcome was the performance of the Romanian deadlift on a flywheel training device, and the secondary outcomes were heart rate and RPE.