Cardio when it's hot outside: do you burn more calories?

[jg42058p]

Say if you go jogging for 45 minutes and it's 100 degrees fahrenheit

and you go jogging for 45 minutes when it's 50 degrees fahrenheit

Would you burn more calories when jogging at 100 degrees?

I can usually jog for an hour - sometimes longer... but when it's 100 degrees during the summer I can only do like 25 minutes before I get burnt out.

This heat wave across the north east USA sucks!!!

[scorpion62]

Where you run greatly affects the heart rate responses to training. Running in the heat increases heart rate in order to increase peripheral blood flow to the skin to improve evaporative heat loss from the body, while running in the cold decreases heart rate in order to keep in the heat. Thus, running in the winter at 7:00 mile pace may elicit a HR of 130 beats/min., while running at that same pace in the summer may elicit a HR of 140 beats/min.
The hotter the body gets in the heat, the more the heart rate will in- crease in an attempt to maintain core body temperature at a safe level. Therefore, when running for long periods of time in the heat, heart rate will drift upwards as the run continues. Would you burn more calories in the heat yes as your heart rate would be higher due to your conditions