TABLE 3.

Heart rate recovery and handgrip strength after singles and doubles beach tennis session stratified by the competition level of the participants.

Variables	Level 1: Advanced (n = 11)	Level 2: Intermediate (n = 11)	∆	p-Value
Heart rate rec (bpm)
Post_0′
Singles	156 ± 5 (150–166)*	142 ± 4 (133–150)	14 ± 7 (1–28)	0.037
Doubles	126 ± 8 (110–143)	138 ± 6 (126–151)	−12 ± 10 (−32 to 9)	0.254
Post_1′
Singles	129 ± 4 (122–136)*	127 ± 3 (120–134)*	2 ± 5 (−8–12)	0.727
Doubles	114 ± 5 (105–123)	115 ± 4 (108–122)	−1 ± 5 (−13 to 10)	0.778
Post_2′
Singles	119 ± 2 (115–123)	119 ± 3 (114–124)	0 ± 3 (−7 to 6)	0.897
Doubles	111 ± 4 (102–119)	119 ± 4 (111–127)	−8 ± 6 (−20 to 3)	0.169
Post_3′
Singles	115 ± 4 (108–123)	112 ± 3 (107–117)	3 ± 5 (−6–12)	0.461
Doubles	108 ± 6 (92–119)	111 ± 3 (106–116)	−3 ± 6 (−16 to 9)	0.627
Post_4′
Singles	112 ± 4 (104–119)	106 ± 2 (102–111)	6 ± 4 (−3–14)	0.234
Doubles	102 ± 6 (91–113)	108 ± 3 (102–113)	−6 ± 6 (−18 to 6)	0.326
Post_5′
Singles	106 ± 4 98–114)*	102 ± 3 (97–108)	4 ± 5 (−6–14)	0.440
Doubles	94 ± 5 (84–104)	102 ± 3 (97–107)	−8 ± 6 (−19 to 3)	0.161
Handgrip strength (KgF)
Pre
Singles	43 ± 2 (39–48)	35 ± 1 (32–38)	8 ± 3 (3–14)	0.002
Doubles	41 ± 2 (37–44)	36 ± 1 (34–38)	5 ± 2 (0–9)	0.034
Post 5′
Singles	42 ± 2 (38–46)	37 ± 1 (35–39)	5 ± 2 (1–10)	0.018
Doubles	43 ± 2 (39–47)	38 ± 1 (36–40)	5 ± 2 (1–10)	0.024
Post 30′
Singles	42 ± 2 (38–46)	36 ± 1 (34–37)	6 ± 2 (1–10)	0.010
Doubles	43 ± 2 (39–48)	37 ± 1 (35–39)	6 ± 3 (1–11)	0.020

Values are mean ± standard error (95% Confidence Interval); *Singles is different from Doubles (p < 0.05); p-value is comparing the levels separately in the session (level 1 vs. level 2). Bold p-values indicate significant results (p < 0.05).