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Table 1 Choice Reaction Time Results

From: Ingesting a pre-workout supplement containing caffeine, B-vitamins, amino acids, creatine, and beta-alanine before exercise delays fatigue while improving reaction time and muscular endurance

Variable

Treatment

T1

T2

T3

T4

Mean

Single Step Visual (CRV)

PL

0.97 ± 0.14

0.98 ± 0.25

0.94 ± 0.11

0.92 ± 0.15

0.95 ± 0.17

 

SUP

0.98 ± 0.23

0.93 ± 0.14

0.91 ± 0.16

0.88 ± 0.12

0.93 ± 0.16

Single Step Audio

(CRA)

PL

0.98 ± 0.09

0.96 ± 0.13

0.96 ± 0.11

0.95 ± 0.12

0.97 ± 0.11

 

SUP

0.96 ± 0.10

0.91 ± 0.09

0.89 ± 0.07

0.92 ± 0.11

0.92 ± 0.10

Stationary 15 s

(CRS15)

PL

0.54 ± 0.04

0.54 ± 0.07

0.56 ± 0.09

0.55 ± 0.08

0.55 ± 0.07

 

SUP

0.56 ± 0.06

0.51 ± 0.05

0.51 ± 0.06

0.51 ± 0.06

0.52 ± 0.06

Lateral 15 s (CRL15)

PL

0.91 ± 0.11

0.91 ± 0.15

0.95 ± 0.11

0.89 ± 0.13

0.91 ± 0.13

 

SUP

0.93 ± 0.11

0.86 ± 0.07

0.88 ± 0.11

0.89 ± 0.12

0.89 ± 0.10

Multi-directional 15 s (CRM15)

PL

1.08 ± 0.10

1.13 ± 0.17

1.19 ± 0.14

1.10 ± 0.12

1.13 ± 0.14

 

SUP

1.07 ± 0.09

1.09 ± 0.10

1.03 ± 0.11

1.09 ± 0.16

1.07 ± 0.12

Stationary 30s (CRS30)

PL

0.56 ± 0.07

0.55 ± 0.09

0.54 ± 0.09

0.54 ± 0.07

0.55 ± 0.08

 

SUP

0.55 ± 0.05

0.52 ± 0.07

0.52 ± 0.06

0.52 ± 0.07

0.53 ± 0.06

Lateral 30s (CRL30)

PL

0.89 ± 0.10

0.93 ± 0.13

0.92 ± 0.10

0.93 ± 0.15

0.92 ± 0.12

 

SUP

0.91 ± 0.10

0.91 ± 0.11

0.87 ± 0.12

0.90 ± 0.10

0.90 ± 0.11

Multi-directional 30s (CRM30)

PL

1.15 ± 0.13

1.16 ± 0.12

1.11 ± 0.15

1.15 ± 0.12

1.14 ± 0.13

 

SUP

1.11 ± 0.10

1.10 ± 0.12

1.06 ± 0.12

1.12 ± 0.12

1.10 ± 0.11

Stick Hits (2 min)

PL

63 ± 11

67 ± 10

63 ± 11

61 ± 12

63 ± 11

 

SUP

66 ± 7

70 ± 10

65 ± 11

65 ± 12

66 ± 10

  1. PL placebo; SUP supplement; T time point; † = significant main effect for supplement, p < 0.05; ‡ = significant interaction between time and supplement, p < 0.05; All data are reported as mean ± standard deviation.