The custom of fasting during Lent started at a very early date, but the length of the fast varied, eight days being customary at first, but the time was extended to forty days, after the analogy of the period included in the Lord's temptation, Matt. 4:2.
Your waist shape is also determined by the integrity and position abdominal wall muscles and your abdominal skin. Liposuction isn't great at managing either one of those and procedures like tummy tucks can help there. The compression garment helps with skin retraction and minimizes swelling.
The compression garment will be worn for up to 23 hours a day (being removed only for bathing and washing), which means it need to be comfortable. No compression garment will feel like wearing sweats, but it should be reasonably comfortable while still applying enough pressure to encourage fluid dispersement.