Table 1. Substrate oxidation during exercise in children, adolescents and adults with CHO or water intake. |
|
Age
(years) |
CHO intake
Ex. protocol |
Treatment |
Time
(min) |
RER 1 |
Substrate
Fat (%) |
Oxidation
CHO(%) |
| Riddell, 2000a |
15 |
1.5 g·kg-1·h-1
91 g·h-1 |
water |
60 |
0.92 |
20-25 |
80-75 |
|
|
60 min at 60% peak VO2 |
CHO |
60 |
0.94 |
18-23 |
82-77 |
| Riddell, 2000b |
15 |
1.4 g·kg-1·h-1
~170 g·2h-1 |
control
|
60
90 |
0.92 - 0.91
- 0.91 |
24-30
24-54 |
76-70
76-46 |
|
|
120 min at 60% peak VO2 |
CHO |
60
90 |
0.95 - 0.94
- 0.93 |
15-23
15-20 |
85-77
85-80 |
| Riddell, 2001 |
12.5 |
~1.5 g·kg-1·h-1
67 ±15 g·h-1 approx av.
for G & GF drinks |
control |
30-60
90 |
0.87 - 0.83
- 0.83 |
40-55
40-55 |
60-45
60-45 |
|
|
90 min at 55%
peak VO2 |
CHO |
30-60
90 |
0.90 - 0.86
- 0.85 |
32-45
32-45 |
67-55
67-55 |
| Timmons, 2001 |
10 |
~1.4 g·kg-1·h-1
boys ~50 g·h-1
men ~119 g·h-1
60 min at 70% peak VO2 |
control
boys
control
men
CHO boys
CHO men |
30-60
30-60
30-60
30-60 |
0.91 - 0.88
0.96 - 0.93
0.91 - 0.91
0.96 - 0.94 |
32-35
15-20
30-30
15-18 |
68-65
85-80
70-70
85-82 |
| Montfort, 2005 |
15-17 |
1.4 g·kg-1·h-1
65 ±7.2 g · h-1 |
control |
30-60
90 |
0.96 – 0.95
0.93 |
11-15
19 |
89-85
- 81 |
|
|
~ 102 g ·90 min |
CHO |
30-60
90 |
0.96 – 0.96
0.94 |
10-10
17 |
90-90
- 83 |
| Riddell, 2003 |
adults |
1 g·kg-1·h-1
~ 78 g · h-1
~ 117 g ·90 min |
control 2
adults |
60
90 |
0.95 - 0.92
- 0.91 |
22 |
72 |
|
|
90 min at 60% peak VO2 |
CHO
adults |
60
90 |
0.97 - 0.94
- 0.94 |
16 |
80 |
|
RER does not include resting values; |
Substrate oxidation data (% fat and carbohydrate) represent the last 60 min of exercise. |
|