Instagram model has lifted the lid on her fitness tips. Grasi Mattos has a strict physical exercise routine and always maintains a balanced diet.But the 24-year-old bombshell credits most of her incredible progress to her daily sex sessions.The fitness fan, who lives in Lisbon, Portugal, says that she dedicates a lot of hours in the day to the activity.She revealed that the only breaks she has are on Sundays, which are her rest days.In total, the stunning model aims to lose a whopping 8,000 calories and in some cases she exercises for four or five hours straight.She said: "It doesn't have to be four or five hours straight, straight, you know?"Sometimes I do, but (usually) I stop, rest, drink water."I do it when I wake up, sometimes in the.
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