Impact of Acute Eccentric versus Concentric Running on Exercise-Induced Fat Oxidation and Postexercise Physical Activity in Untrained Men

Table 2

Comparison between physiological responses during constant-load flat running (FR) and downhill running (DHR) tests.

Time	FR	DHR	Mean change (95% CI)	Percentage change (%)	value
VO2 (ml/min/kg)
8 minutes			-2.43 (-7.7-2.8)	15.69	0.413
18 minutes			-2.70 (-7.8-2.4)	17.75	0.273
28 minutes			-3.4 (-8.5-1.7)	22.19	0.184
38 minutes			-3.86 (-9.0-1.3)	25.03	0.139
48 minutes			-3.52 (-8.6-1.6)	22.15	0.186
Time effect	<0.001
Timegroup	0.006
Fat oxidation (g/min)
8 minutes			-0.13 (-0.25–-0.004)	50.0	0.120
18 minutes			-0.15 (-0.26–-0.04)	68.18	0.056
28 minutes			-0.18 (-0.32–-0.05)	78.26	0.046
38 minutes			-0.16 (-0.30–-0.02)	64.0	0.089
48 minutes			-0.14 (-0.28-0.01)	50	0.146
Time effect	0.016
Timegroup	0.319
CHO oxidation (g/min)
8 minutes			0.14 (-0.24-0.52)	15.38	0.384
18 minutes			0.12 (-0.33-0.57)	12.37	0.532
28 minutes			0.14 (-0.31-0.58)	14.43	0.487
38 minutes			0.04 (-0.40-0.48)	4.39	0.833
48 minutes			-0.01 (-0.43-0.42)	1.13	0.971
Time effect	0.420
Timegroup	0.300
RER
8 minutes			0.04 (-0.003-0.08)	4.59	0.113
18 minutes			0.05 (0.01-0.09)	5.62	0.041
28 minutes			0.05 (0.01-0.10)	5.62	0.036
38 minutes			0.04 (-0.01-0.08)	4.54	0.150
48 minutes			0.03 (-0.02-0.08)	3.49	0.274
Time effect	0.212
Timegroup	0.323
HR (beat/min)
8 minutes			-14.5 (-34.9-5.9)	12.91	0.158
18 minutes			-18.8 (-37.8-0.22)	16.67	0.048
28 minutes			-19.40 (-38.9-0.15)	16.52	0.059
38 minutes			-23.4 (-46.6–-0.22)	20.29	0.034
48 minutes			-26.1 (-52.9-0.68)	22.56	0.032
Time effect	<0.001
Timegroup	0.053

Data are presented as . FR: flat running; DHR: downhill running; CI: confidence interval; CHO: carbohydrate; RER: respiratory exchange ratio; HR: heart rate. value significant at , 0.01 level.