Table 2.
Energy expenditure and macronutrient composition by heart rate zone.
Polar Grit X Pro
(Mean ± SD)
Metabolic cart
(Mean ± SD)
ICC
ICC
Interpretation
95% CI
F
p
Exercise intensities combined
n
75
75
Calories
122 ± 36
111 ± 32
0.80
Excellent
0.61-0.89
11.76
<0.001
***
%FAT
39 ± 23
35 ± 18
0.49
Fair
0.30-0.65
2.98
<0.001
***
%CHO
61 ± 23
65 ± 18
0.49
Fair
0.30-0.65
2.98
<0.001
***
Zone 1 (50-59% HRmax)
n
16
16
Calories
75 ± 9
69 ± 12
0.15
Poor
-0.30-0.58
1.39
0.259
%FAT
69 ± 4
53 ± 21
0.04
Poor
-0.24-0.41
1.11
0.415
%CHO
31 ± 4
47 ± 21
0.04
Poor
-0.24-0.41
1.11
0.415
Zone 2 (60-69% HRmax)
n
16
16
Calories
103 ± 16
96 ± 18
0.58
Fair
0.16-0.83
4.33
0.005
**
%FAT
54 ± 8
35 ± 17
0.14
Poor
-0.12-0.49
1.79
0.185
%CHO
46 ± 8
65 ± 17
0.14
Poor
-0.12-0.49
1.79
0.185
Zone 3 (70-79% HRmax)
n
16
16
Calories
129 ± 19
120 ± 15
0.26
Poor
-0.19-0.65
1.79
0.129
%FAT
36 ± 12
30 ± 13
0.15
Poor
-0.31-0.58
1.39
0.260
%CHO
64 ± 12
70 ± 13
0.15
Poor
-0.31-0.58
1.39
0.260
Zone 4 (80-89% HRmax)
n
14
14
Calories
150 ± 16
135 ± 15
0.09
Poor
-0.25-0.51
1.28
0.328
%FAT
21 ± 10
29 ± 14
0.28
Poor
-0.16-0.67
2.01
0.112
%CHO
80 ± 10
71 ± 14
0.28
Poor
-0.16-0.67
2.01
0.112
Zone 5 (90-100% HRmax)
n
13
13
Calories
166 ± 17
146 ± 17
0.07
Poor
-0.23-0.48
1.24
0.354
%FAT
7 ± 5
25 ± 13
0.09
Poor
-0.10-0.42
1.68
0.238
%CHO
93 ± 5
75 ± 13
0.09
Poor
-0.10-0.42
1.68
0.238
%CHO, present calories from carbohydrate; CI, confidence interval; %FAT, percent calories from fat; ICC, intraclass correlation coefficient; SD, standard deviation.
** p < 0.01,
*** p < 0.001