Study design
This study was carried out in a randomized, cross-over, and double-blinded manner (Study design and allocation of participants to four experimental conditions for each trial. LDC: low dose coffee. HDC: High dose coffee, PLA: Placebo, CON: Control.Supplementation and testing protocol FIET. FIET: futsal intermittent endurance test, VAS: visual analogue scale, Baseline-CMR: Baseline CMR, IA-FIET: immediately after the FIET, 5”A-FIET: 5 minutes after the FIET, 10”A-FIET: 10 minutes after the FIET.