Table 1.  Heart rate and ratings of perceived exertion during multiple contractions, 30 repetitive plus 3 sets of 15 repetitions of biceps curls performed at 20% of 1-RM (n = 10). Values are mean (± SE).
 

Pre

C30

S1-R15

S2-R15

S3-R15

Heart rate (BPM)

  Control

75 (3)

89 (3)

89 (3)

90 (3)

91 (3)

  98 mmHg 

76 (4)

91 (4)

92 (4)

93 (4)

93 (4)

  121 mmHg 

75 (3)

92 (4)

93 (5)

93 (4)

93 (5)

  147 mmHg 

74 (2)

93 (3)

93 (3)

98 (3)

99 (4)

Rating of Perceived Exertion

  Control

-

12 (1)

12 (1)

13 (1)

13 (1)

  98 mmHg 

-

13 (1)

14 (1)

15 (1) *

16 (1) *

  121 mmHg 

-

14 (1) *

15 (0) *

15 (1) *

16 (1) *

  147 mmHg 

-

14 (1) *

15 (1) *

16 (1) *

17 (1) *
Pre = pre-contraction bout, C30 =3 0th contraction, S1-R15 = 15th repetition of the 1st set, S2-R15 = 15th repetition of the 2nd set, and S3-R15 = 15th repetition of the 3rd set. Low, Mid, and High = blood flow restriction; cuff pressure at 98 (3), 121 (4), and 147 (4) mmHg. * different from control (p < 0.05).