You will also build muscle walking if your terrain includes hills, both up and down. When I was in college, our campus was built on a hill and my residence hall was at the bottom of the hill. I definitely built some calf muscles just walking up and down the hills every day.
Pounds lost: 0.0
Fitness Minutes: (90,021)
6,183 12/17/13 10:13 A
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.
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