TY - JOUR
T1 - Caffeine supplementation is ergogenic in soccer players independent of cardiorespiratory or neuromuscular fitness levels
AU - Apostolidis, Andreas
AU - Mougios, Vassilis
AU - Smilios, Ilias
AU - Frangous, Maria
AU - Hadjicharalambous, Marios
PY - 2020/6/8
Y1 - 2020/6/8
N2 - BACKGROUND: Equivocal findings examining the influence of caffeine on performance and biological responses to exercise may be due to inter-individual variability in cardiorespiratory or neuromuscular fitness. This study examined whether the effects of caffeine ingestion on exercise performance and biological responses to prolonged intermittent exercise to exhaustion depend on cardiorespiratory or neuromuscular fitness. METHODS: Twenty male soccer players, separated according to either cardiorespiratory fitness (high vs medium) or neuromuscular fitness (high vs medium) underwent two trials simulating the cardiovascular demands of a soccer game to exhaustion on treadmill after ingesting either caffeine (6 mg∙kg- 1) or placebo. Physical performance, cardiorespiratory and metabolic parameters and blood metabolites were evaluated. RESULTS: Time to exhaustion (719 ± 288 vs 469 ± 228 s), jump height (42.7 ± 4.2 vs 38.6 ± 4.4 cm), heart rate (163 ± 12 vs 157 ± 13 b∙min- 1), mean arterial blood pressure (98 ± 8 vs 92 ± 10 mmHg), plasma glucose (5.6 ± 0.7 vs 5.3 ± 0.6 mmol∙l- 1) and lactate (3.3 ± 1.2 vs 2.9 ± 1.2 mmol∙l- 1) were higher, while rating of perceived exertion (12.6 ± 1.7 vs 13.3 ± 1.6) was lower with caffeine vs placebo (p < 0.01), independent of cardiorespiratory or neuromuscular fitness level. Reaction time; plasma glycerol, non-esterified fatty acids and epinephrine; carbohydrate and fat oxidation rates; and energy expenditure were not affected by caffeine (p > 0.05). CONCLUSIONS: Caffeine was effective in improving endurance and neuromuscular performance in athletes with either high or medium cardiorespiratory and neuromuscular fitness. Cardiorespiratory and neuromuscular fitness do not appear to modulate the ergogenic effects of caffeine supplementation in well-trained athletes.
AB - BACKGROUND: Equivocal findings examining the influence of caffeine on performance and biological responses to exercise may be due to inter-individual variability in cardiorespiratory or neuromuscular fitness. This study examined whether the effects of caffeine ingestion on exercise performance and biological responses to prolonged intermittent exercise to exhaustion depend on cardiorespiratory or neuromuscular fitness. METHODS: Twenty male soccer players, separated according to either cardiorespiratory fitness (high vs medium) or neuromuscular fitness (high vs medium) underwent two trials simulating the cardiovascular demands of a soccer game to exhaustion on treadmill after ingesting either caffeine (6 mg∙kg- 1) or placebo. Physical performance, cardiorespiratory and metabolic parameters and blood metabolites were evaluated. RESULTS: Time to exhaustion (719 ± 288 vs 469 ± 228 s), jump height (42.7 ± 4.2 vs 38.6 ± 4.4 cm), heart rate (163 ± 12 vs 157 ± 13 b∙min- 1), mean arterial blood pressure (98 ± 8 vs 92 ± 10 mmHg), plasma glucose (5.6 ± 0.7 vs 5.3 ± 0.6 mmol∙l- 1) and lactate (3.3 ± 1.2 vs 2.9 ± 1.2 mmol∙l- 1) were higher, while rating of perceived exertion (12.6 ± 1.7 vs 13.3 ± 1.6) was lower with caffeine vs placebo (p < 0.01), independent of cardiorespiratory or neuromuscular fitness level. Reaction time; plasma glycerol, non-esterified fatty acids and epinephrine; carbohydrate and fat oxidation rates; and energy expenditure were not affected by caffeine (p > 0.05). CONCLUSIONS: Caffeine was effective in improving endurance and neuromuscular performance in athletes with either high or medium cardiorespiratory and neuromuscular fitness. Cardiorespiratory and neuromuscular fitness do not appear to modulate the ergogenic effects of caffeine supplementation in well-trained athletes.
KW - Biochemical responses
KW - Endurance performance
KW - Ergogenic aid
KW - Explosiveness
UR - http://www.scopus.com/inward/record.url?scp=85086296752&partnerID=8YFLogxK
U2 - 10.1186/s12970-020-00360-x
DO - 10.1186/s12970-020-00360-x
M3 - Article
C2 - 32513182
AN - SCOPUS:85086296752
SN - 1550-2783
VL - 17
JO - Journal of the International Society of Sports Nutrition
JF - Journal of the International Society of Sports Nutrition
IS - 1
ER -