Table 2 Responses in incremental treadmill test (ITMT), two-minute step test (2MST) and six-minute walk test (6MWT) at the peak of the tests.

From: Responses of different functional tests in candidates for bariatric surgery and the association with body composition, metabolic and lipid profile

Variables

ITMT (n = 44)

6MWT (n = 44)

2MST (n = 44)

V̇O2, mL·min−1

1818.7 (1691.0–1946.5)

1210.2 (1120.3–1300.1)a

1379.4 (1289.9–1468.9)b,c

V̇O2, mL·kg−1·min−1

16.1 (15.2–17.0)

10.7 (10.0–11.4) a

12.3 (11.6–13.0)b,c

V̇O2, %pred

80.6 (77.5–83.7)

54.3 (51.0–57.7) a

62.6 (58.4–66.7)b,c

V̇CO2, mL·min−1

2345.6 (2185.8–2505.5)

1169.3 (1076.9–1261.7)a

1390.6 (1278.0–1503.3)b

RER

1.31 (1.26–1.35)

0.96 (0.93–0.98) a

1.0 (0.96–1.04)b

E, L·min−1

85.3 (80.9–89.7)

40.4 (37.2–43.6)a

46.5 (42.9–50.0)b

BF, br·min−1

44.9 (42.0–47.9)

31.5 (29.0–34.1)a

30.5 (28.3–32.7)b

HR, bpm

169.7 (164.5–175.0)

126.0 (122.4–129.5)a

139.2 (133.2–145.2)b,c

HR, %pred

94.3 (92.0–96.6)

68.5 (66.3–70.6)a

75.2 (71.9–78.5)b,c

SBP, mmHg

195.1 (187.7–202.5)

163.9 (154.8–173.1)a

175.9 (164.7–187.2)b

DPB, mmHg

101.8 (98.4–105.3)

96.0 (92.4–99.6)a

100.9 (96.1–105.6)

Dyspnea (0–10 score)

7 (1; 10)

2 (0; 10)a

3 (0; 7)b

Leg fatigue (0–10 score)

3.5 (0; 10)

0.8 (0; 7)a

1.5 (0; 7)b

  1. Data are reported as mean or median, according to data distribution, and CI (confidence interval). V̇O2: oxygen uptake, V̇CO2: carbon dioxide production, RER: respiratory exchange rate, VE: minute ventilation, BF: breathing frequency, HR: heart rate, HRmax: maximal heart rate, SBP: systolic blood pressure, DBP: diastolic blood pressure. Intragroup differences (one-way ANOVA).
  2. aITMT versus 6MWT.
  3. bITMT versus 2MST.
  4. c6MWT versus 2MST; p < 0.05.