I'm not quite sure what is behind your question. Do you want to build muscle, or are you concerned about 'bulking up'.
To build muscle (and even just to maintain your existing muscle as you lose weight) you need to be doing quality strength training that genuinely challenges your muscles at close to their maximum capacity. This is generally taken as being challenging enough to fatigue your legs in 15 reps or less.
Walking is cardio, not strength training, and will NOT build muscle.
Also, fat is considerably denser than fat. (Check www.dailyspark.com/blog.asp?post=quiz_how_
for a great photo of this). Bulk in the legs is almost always due to fat, not muscle.
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.
| current weight: 178.0