Probability and statistics , Week 4 , paired t-Test

Hi friends I hope you are all well!
so i had a question : in probability and statistics , Week 4 , paired t-Test , that mr.serrano taught the paired t-test and in the end we found out the mu for after the diet for our sample has increased and our H0 should be rejected , doesnt it meant that our programm for loosing weight isn’t good ? because the mu has increased?

For how this problem is defined, a positive mu value means weight is lost.