. 2021 Mar 30;18:25. doi: 10.1186/s12970-021-00421-9

Table 2.

Summary of performance data in bench press exercise after the ingestion of a placebo (PLAC) or 3 (CAF-3) or 6 mg/kg/b.m. of caffeine (CAF-6) in women habituated to caffeine

Variable	PLAC (95 % CI)	CAF-3 (95 % CI)	CAF-6 (95 % CI)	p
1RM [kg]	40.48 ± 9.21 (36.29 to 44.67)	41.68 ± 8.98 (37.59 to 45.76)	42.98 ± 8.79 (38.98 to 46.98)	< 0.01
REP [n]	33.05 ± 6.59 (30.05 to 36.05)	33.81 ± 5.46 (31.32 to 36.30)	35.29 ± 6.99 (32.10 to 38.47)	0.18
TUT [s]	53.52 ± 11.44 (48.3 to 58.7)	57.05 ± 10.90 (52.1 to 62.0)	61.76 ± 15.39 (54.8 to 68.8)	< 0.01
MP [W]	119 ± 25 (107 to 130)	120 ± 27 (107 to 132)	122 ± 31 (108 to 137)	0.56
PP [W]	284 ± 145 (219 to 350)	277 ± 82 (239 to 314)	290 ± 110 (240 to 340)	0.75
MV [m/s]	0.61 ± 0.08 (0.58 to 0.65)	0.60 ± 0.07 (0.56 to 0.63)	0.59 ± 0.07 (0.56 to 0.63)	0.45
PV [m/s]	1.14 ± 0.11 (1.09 to 1.19)	1.14 ± 0.10 (1.09 to 1.18)	1.11 ± 0.13 (1.05 to 1.17)	0.23

Variable

PLAC
(95 % CI)

CAF-3
(95 % CI)

CAF-6
(95 % CI)

1RM [kg]

40.48 ± 9.21

(36.29 to 44.67)

41.68 ± 8.98

(37.59 to 45.76)

42.98 ± 8.79

(38.98 to 46.98)

< 0.01

REP [n]

33.05 ± 6.59

(30.05 to 36.05)

33.81 ± 5.46

(31.32 to 36.30)

35.29 ± 6.99

(32.10 to 38.47)

0.18

TUT [s]

53.52 ± 11.44

(48.3 to 58.7)

57.05 ± 10.90

(52.1 to 62.0)

61.76 ± 15.39

(54.8 to 68.8)

< 0.01

MP [W]

119 ± 25

(107 to 130)

120 ± 27

(107 to 132)

122 ± 31

(108 to 137)

0.56

PP [W]

284 ± 145

(219 to 350)

277 ± 82

(239 to 314)

290 ± 110

(240 to 340)

0.75

MV [m/s]

0.61 ± 0.08

(0.58 to 0.65)

0.60 ± 0.07

(0.56 to 0.63)

0.59 ± 0.07

(0.56 to 0.63)

0.45

PV [m/s]

1.14 ± 0.11

(1.09 to 1.19)

1.14 ± 0.10

(1.09 to 1.18)

1.11 ± 0.13

(1.05 to 1.17)

0.23

All data are presented as mean ± standard deviation; CI confidence interval; 1RM one-repetition maximum; REP number of performed repetitions; TUT time under tension; MP mean power output; PP peak power output; MV mean bar velocity; PV peak bar velocity