Table 3. Results from the stress tests. Data are means (±SD). Control Group (n=25) Tennis Group (n=27) BE Group (n=27) Initial Final Initial Final Initial Final HRmax 125 (17) 141 (15) ** 120 (15) 136 (19) *** 125 (15) 142 (15) *** %HRmax 75 (9) 80 (9) ** 73 (8) 83 (11) *** 74 (9) 85 (9) *** Borg 14 (2) 15 (2) 14 (2) 14 (2) 14 (1) 14 (2) METs 9 (2) 10 (2) ** 9 (2) 11 (2) *** 9 (2) 11 (2) *** PSS 169 (26) 175 (26) 170 (19) 171±15 166 (30) 172 (28) PSD 89 (9) 92 (11) * 90 (8) 90 (12) 87 (9) 87 (11) T´Test 8 (2) 9 (2) ** 8 (2) 10 (2) *** 8 (2) 10 (2) *** Rest HR 76 (14) 78 (13) 73 (15) 71 (14) 77 (9) 76 (9) Double Product 19480 (5427) 21163 (3867) 18215 (3595) 20979 (4617) ** 18650 (5617) 22008 (4440) *** HRmax: maximum heart rate achieved in the stress test; Borg: scores obtained in the questionnaire on subjective perception in the Borg stress test; METS: metabolic equivalents; PSS: systolic blood pressure; PSD: diastolic blood pressure; T`Test: test duration in minutes; HR rest: cardiac frequency before the start of the test. * p < 0.05; ** p < 0.01; *** p < 0.001