If I had Liposuction and get into sports like bodybuilding, will it become visible with lower body fat?

The answer to your question is yes, even fitness models get liposuction of stubborn areas of fat that do not respond to diet and exercise.  The "saddlebag' region tends to be one of those areas, even for very physically active people like marathoners, triathletes, cyclists, swimmers, etc. The percentage of body fat for amateur women bodybuilders tends to range between 14%-20%.  This should not present a problem for a conservative, well performed liposuction of the lateral thighs.

Patients who are fit near ideal body weight with areas of unwanted fat are the best candidates for liposuction. Most the time the fat is modest in surplus and the skin covering the area will easily adapt to the change in volume.

Liposuction is great for stubborn areas, and I've had some fitness model patients who have had the surgery to redefine their contours, especially in their stomach area. Lower body fat won't affect your results. You'll still be leaner in the areas treated.