How many calories did Duoyan Zheng lose in one episode?

I found it on Mint. com。

Duoyan Zheng slimming exercise 1 (Little Red Riding Hood) 5 13 calories /60 minutes.

Duoyan Zheng slimming exercise 2 (dumbbell exercise) 580 calories /60 minutes.

Duoyan Zheng Weight Loss Campaign 3 (Little Grey Hat) 435 calories /60 minutes.

Duoyan Zheng slimming exercise 4 387 calories /60 minutes.

Duoyan Zheng exercises 5 387 calories /60 minutes.

But an episode is almost 40 minutes. A person can spend more than 300 cards.