The weight limit that the fitness booster belt can increase depends on the user's fitness foundation and the material, brand and length of the booster belt. Generally speaking, the booster belt can help users gain about * * 120kg * *. But this is not a universal law, and the specific amount of aggravation needs to be adjusted according to personal circumstances. Under normal circumstances, people who have a certain fitness foundation do not need to use booster belts below 100 kg. But when the weight exceeds 120 kg, many people's fingers are not strong enough and need help to pull up the barbell.