Table 4.

Articles predominantly related to nutrition.

Study and sport in which the study was carried out	Sample	Main outcomes measured	Results	Quality score (%)
(27) Basketball	10 male basketball players (15.6 ± 0.5 years, body weight 76.3 ± 9.0 kg, height 184.3 ± 7.5 cm, body mass index 22.5 ± 2.9).	Participants drank either beetroot juice or a placebo and then played a simulated basketball game for 40 min. Physical metrics were tested afterward: jump, grip strength, agility, and sprinting. Kinematics/mechanical metrics were monitored.	Acute moderate doses of BJ (12.8 mmol of NO3−) were useless in improving the players’ performance.	93.3
(28)—Futsal	16 top-level male players (age: 28.0 ± 4.1 years; height:173.8 ± 6.1 cm; body mass: 71.2 ± 9.7 kg; futsal experience: 12.4 ± 2.9 years)	Futsal-specific tests (CMJ, 20-m sprint test, kicking velocity, and accuracy test). Simulated matches were conducted between the controlled (ingested 3mg/kg of caffeine) and placebo groups. Kinematics/mechanical metrics were monitored.	Jump, sprint performance, high-speed running, ACC, and DEC, were improved by 3 mg/kg of coffee. Caffeine supplementation improves futsal performance when used in moderation.	100