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Table 1 Mean ± SD for the rating of perceived exertion (RPE) for every stage of the YYIR1

From: Acute effects of beetroot juice and caffeine co-ingestion during a team-sport-specific intermittent exercise test in semi-professional soccer players: a randomized, double-blind, placebo-controlled study

 

BJ + CAF

CAF + PL

BJ + PL

PL + PL

RPE

N

RPE

N

RPE

N

RPE

N

Stage 9

6 ± 0

16

6 ± 1

16

6 ± 0

16

6 ± 1

16

Stage 11

7 ± 1

16

7 ± 1

16

7 ± 1

16

7 ± 1

16

Stage 12

7 ± 0

16

7 ± 1

16

7 ± 1

16

7 ± 1

16

Stage 13

8 ± 1

16

8 ± 1

16

8 ± 1

16

8 ± 1

16

Stage 14

10 ± 1

16

9 ± 1

16

10 ± 1

16

10 ± 1

16

Stage 15

12 ± 2

16

11 ± 1

16

12 ± 2

16

12 ± 1

16

Stage 16

15 ± 3

15

14 ± 2

16

15 ± 3

15

15 ± 2

15

Stage 17

17 ± 3

13

17 ± 2

13

17 ± 2

13

17 ± 2

12

Stage 18

19 ± 2

10

18 ± 2

9

19 ± 2

11

19 ± 1

9

Stage 19

19 ± 1

6

19 ± 1

5

18 ± 2

3

20 ± 0

5

Stage 20

20 ± 1

3

20 ± 1

2

20 ± 0

2

-

0

Stage 21

20

1

-

0

-

0

-

0

  1. BJ Beetroot juice, CAF caffeine, PL placebo