In weight bearing exercises what is more important: the number of repetitions or the weigh of the weight? ?

Question

And how many days a week one should do weight bearing exercise to loose weight?

Also how long does it take for body to start building muscle?

Answer 1

Well. depending on how your body is and what you're eating/how you're weightlifting exercising you may gain weight by gaining more muscle and losing fat. Muscle weighs more than fat, remember.

If you're just starting out try using a low level weight and just doing more reps. Maybe 2 reps of 15 for each arm. Rest between the reps for about 30 minutes or so. If you use more weight you may end up injuring yourself.

Only weightlift every other day. So...3 times a week. Believe me, if you are not used to weightlifting you will NEED that day in between for your muscles to recuperate. If your muscles still feel really sore on the day you're supposed to weightlift then you may want to wait an extra day before continuing your routine.

Answer 2

The weight of the weight is more important, because that ultimately determines the amount of repetitions you will be doing.  

You should be doing resistance-training around 3-5 times a week, I recommend 4 times a week if you plan on doing cardio also.  

The body will start building muscle soon after workouts when it is given rest and the proper nutrients to rebuild and repair the broken down muscle fibers.  

Best of luck!