Fifth day and sixth day of fitness

On Monday, I joined the fitness club and ran the running machine for 18 minutes. I burnt 140 calories. 

Yesterday, I joined fitness again, but this time, I used a personal trainer. I learned how to use the materials/ objects that can be used in the gym. First, the guide explained how much calories should be burnt in a week by using the running machine (I burnt only around 50 calories yesterday). He said it is good if we can burn 1000 calories in one week. If we can burn 4000 calories, then it could also mean that we lose 1 kg of our weight. After that, we learned how to use the fitness materials for arms, abs and legs. At the end, we ended with stretching. However, we're not done yet with the explanations and so on. So I am going to meet the trainer again next Monday.