Cardio
- Thread starter allsmile
- Start date
good question.
sweating is just a loss of fluid and afaik has nothing to do with fat loss but it can lead to dehydration.
normally after prolonged exercise in the cold its all the same.
though there is contradictory info, cardio performance and fat loss have been shown to be increased in colder temperatures.
there may also be a need for extra carbohydrates.
sweating is just a loss of fluid and afaik has nothing to do with fat loss but it can lead to dehydration.
normally after prolonged exercise in the cold its all the same.
though there is contradictory info, cardio performance and fat loss have been shown to be increased in colder temperatures.
there may also be a need for extra carbohydrates.
The effects of exercise and diet manipulation on the capacity to perform prolonged exercise in the heat and in the cold in trained humans
Y. P. Pitsiladis and R. J. Maughan
Department of Biomedical Sciences, University Medical School, Aberdeen AB25 2ZD, UK
This study examined the effects of exercise and diet manipulation intended to alter initial muscle glycogen levels on the capacity to perform prolonged exercise at two ambient temperatures.
Six well-trained cyclists participated in randomized order in two diet and exercise regimens each lasting 8 days and comprising four cycle tests to exhaustion at 70 % of maximum oxygen uptake. On days 1 and 5, subjects exercised to exhaustion to deplete muscle glycogen. Three days after each depletion trial a diet providing 10 % (low carbohydrate (CHO)) or 80 % (high CHO) of energy as CHO was consumed, and each diet was followed by a performance trial at the same ambient temperature, either 10 or 30 °C (days 4 and 8). This schedule was repeated after a week, but performance trials were carried out at the other ambient temperature.
In the cold, cycling time increased (median (range)) from 89·2 min (78·0-129·5 min) on the low CHO trial to 158·2 min (116·9-165·6 min) on the high CHO trial (P < 0·01). In the heat, cycling time increased from 44·0 min (31·8-51·4 min) on the low CHO trial to 53·2 min (50·2-82·2 min) on the high CHO trial (P = 0·02). Total CHO oxidized during exercise in the cold after the low CHO diet was higher than in the heat after either diet suggesting that exercise in the heat was terminated before all available CHO stores had been emptied.
Y. P. Pitsiladis and R. J. Maughan
Department of Biomedical Sciences, University Medical School, Aberdeen AB25 2ZD, UK
This study examined the effects of exercise and diet manipulation intended to alter initial muscle glycogen levels on the capacity to perform prolonged exercise at two ambient temperatures.
Six well-trained cyclists participated in randomized order in two diet and exercise regimens each lasting 8 days and comprising four cycle tests to exhaustion at 70 % of maximum oxygen uptake. On days 1 and 5, subjects exercised to exhaustion to deplete muscle glycogen. Three days after each depletion trial a diet providing 10 % (low carbohydrate (CHO)) or 80 % (high CHO) of energy as CHO was consumed, and each diet was followed by a performance trial at the same ambient temperature, either 10 or 30 °C (days 4 and 8). This schedule was repeated after a week, but performance trials were carried out at the other ambient temperature.
In the cold, cycling time increased (median (range)) from 89·2 min (78·0-129·5 min) on the low CHO trial to 158·2 min (116·9-165·6 min) on the high CHO trial (P < 0·01). In the heat, cycling time increased from 44·0 min (31·8-51·4 min) on the low CHO trial to 53·2 min (50·2-82·2 min) on the high CHO trial (P = 0·02). Total CHO oxidized during exercise in the cold after the low CHO diet was higher than in the heat after either diet suggesting that exercise in the heat was terminated before all available CHO stores had been emptied.
Fat utilization enhance by exercise in a cold environment.
Orginal Investigation
Medicine & Science in Sports & Exercise. 17(6):673-678, December 1985.
TIMMONS, BARBARA A.; ARAUJO, JOHN; THOMAS, TOM R.
Abstract:
To study substrate utilization during cold temperature exercise, seven men dressed in shorts, Tshirts, and light gloves performed 60 min of continuous cycle ergometer exercise at -10[degrees]C and 22[degrees]C. The workload at both temperatures represented 66% of the cycle-measured maximal heart rate. Oxygen consumption and respiratory exchange ratio (RER) were measured at rest and during 60 min of exercise. Rates of total and fat energy utilization (kJ.min-1)during exercise were calculated from VO2 and RER. A two-factor repeated measures analysis of variance indicated that at rest oxygen consumption averaged 56% higher and RER 5% lower at - 10[degrees]C. During exercise, oxygen consumption averaged 10% higher (P<0.05), and RER averaged 2% lower (P<0.05) at - 10[degrees]C. The rates of total energy use (mean +/- SD=39.3 +/- 1.2 vs 35.7 +/- 1.3 kJ min-1 P<0.05) were significantly higher at -10[degrees]C than at 22[degrees]C. In addition, the rate of fat use increased significantly in both groups after 30 min of exercise. The cumulative total energy expenditure for 60 min of exercise was 13% higher (2379 +/- 308 vs 2110 +/- 415 kJ; P<0.O5 and the cumulative fat expenditure was 35% higher (979 +/- 209 vs 724 +/- 184 kJ; P<0.05) in the cold environment. These results indicate that a cold environment can significantly enhance fat utilization during endurance exercise.
(C)1985The American College of Sports Medicine
Orginal Investigation
Medicine & Science in Sports & Exercise. 17(6):673-678, December 1985.
TIMMONS, BARBARA A.; ARAUJO, JOHN; THOMAS, TOM R.
Abstract:
To study substrate utilization during cold temperature exercise, seven men dressed in shorts, Tshirts, and light gloves performed 60 min of continuous cycle ergometer exercise at -10[degrees]C and 22[degrees]C. The workload at both temperatures represented 66% of the cycle-measured maximal heart rate. Oxygen consumption and respiratory exchange ratio (RER) were measured at rest and during 60 min of exercise. Rates of total and fat energy utilization (kJ.min-1)during exercise were calculated from VO2 and RER. A two-factor repeated measures analysis of variance indicated that at rest oxygen consumption averaged 56% higher and RER 5% lower at - 10[degrees]C. During exercise, oxygen consumption averaged 10% higher (P<0.05), and RER averaged 2% lower (P<0.05) at - 10[degrees]C. The rates of total energy use (mean +/- SD=39.3 +/- 1.2 vs 35.7 +/- 1.3 kJ min-1 P<0.05) were significantly higher at -10[degrees]C than at 22[degrees]C. In addition, the rate of fat use increased significantly in both groups after 30 min of exercise. The cumulative total energy expenditure for 60 min of exercise was 13% higher (2379 +/- 308 vs 2110 +/- 415 kJ; P<0.O5 and the cumulative fat expenditure was 35% higher (979 +/- 209 vs 724 +/- 184 kJ; P<0.05) in the cold environment. These results indicate that a cold environment can significantly enhance fat utilization during endurance exercise.
(C)1985The American College of Sports Medicine
Thank you so much for the info. This board is awesome. I'm gonna go out an run my ass of this morning.
thanks, i know i'm awesome.
how is progress with the cardio going?
are you doing it fueled or on an empty stomach?
and for how long?
Similar threads
