Let's say you had 5 interviews over the course of five days, each lasting 5 hours. You presumably lost 1800 grams (around 4 lbs) of fat during that time, which would require energy expenditure of 37000 joules. Let's also assume you ate the same as you usually do for weight maintenance.

If you spent all that energy during the interviews, it would require sustained power output of 740 watts over your usual energy expenditure.

If you spent all that energy during waking hours (let's say 16 hours a day), it would require power output of 230 watts over usual energy expenditure.

And finally, if you spent that energy during entire day, it would require power output of 155 watts over usual energy expenditure.

For reference, energy expenditure that would amount to 2000 kcal/day turns out to be around 100 watts. Losing 1800 grams over 5 days would require additional 3240 kcals on top of that.