Alright, I would like to reply to this post first by saying there are some sad responses here. I am not trying to offend anyone, but if you don't have the time to reply correctly, or worst yet, don't know what you are talking about, just wait for someone else to reply.
The original post:
"Hello everyone, I've decided I want to lose weight I'm 16 around 5"9" 179 pounds whats a good work out to lose weight get toned and build a lot of muscle?"
Working out is only part of the equation here. I can't believe nobody replied to you about your nutrition plan, come on people! Nutrition is the key here. Most people, who are wrong by the way, would tell you to eat less and exercise more. This will only kill your resting metabolic rate, which comprises the majority of the calories you burn each and every day. That being said, you want to create a balanced plan of attack with great eating strategies, a weight training routine, and a cardio routine. Not one without the other. All three work in synergy.
For the nutrition, you should start eating small meals 5-7 times per day. Use one of the online calculators to get an "idea" of where your maintenance level of calories lies. All this is, is simply the amount of calories that you can eat, where your weight will remain the same since you will probably be burning about the same amount of calories as you are intaking. In order to lose fat, you want to create a very small reduction in caloric intake, so subtract 15-20% off of the maintenance level that you calculate.
Once you determine what this number is, then divide it by the number of meals you are going to shoot for. This number will give you the number of calories that should be in each meal, roughly. Remember, 5-7 meals is ideal. I know that sounds outrageous to you maybe, but it really is the key to regulating your metabolism, insulin, and many other biological factors of food digestion. These new meals should contain lean proteins like chicken, turkey, eggs, lean beef, protein supplements, etc. They should also contain good carbs such as whole wheat breads, wraps, cereals, brown rice, fat-free cottage cheese, low fat and no fat dairy, etc. Try and take these carbs in mainly close to before and after your workouts, and also earlier in the day. You also want to get some healthy fats in you. You can obtain this through flax, nuts, fish, fish-oil pills, good oils, etc. Don't forget the fruits and veggies, and drink plenty of water.
It seems to me that you are looking for a workout that burns fat and builds muscle. There really is no such thing. A small percentage of the population, and this probably does not include you, can build muscle and burn fat easily. Unfortunately, most of us have to stick to one goal at a time. Either build muscle or burn fat. If you have not trained with weights before, there is a good chance that you will be able to both simultaneously for a short period. This will stop though. To build muscle, you need a caloric surplus and to lose fat, you need a caloric deficit. But these overages and underages are small for most of us to be able to reach our goals.
As for the weight room, you want to create a balanced routine that contains a multitude of compound exercises (exercises that require the use of more then one major muscle group). Forget the curls and tricep press-downs you see in the mags, they are useless. Create a full-body routine that consists of exercises like squats, dead-lifts, lunges, presses, and pulls. Presses include chest presses which can be done on many different angles and can be done with a barbell or dumbbells. Presses also include overhead presses which too can be done with barbells or dumbbells. Overhead presses focuses more on your shoulders. Pulling exercises are mainly for your back. These include vertical pulls which contain pull-ups and pull-downs as well as horizontal pulls which contain rowing exercises such as the bent over barbell row. All of these exercises require aid from your smaller muscle groups such as bis and tris, which will get plenty of activation using these main compound lifts. Follow a full-body routine 3 days per week, don't train more then 2 consecutive days in a row. As for reps, most will tell you to stick with 8-12. I don't like being locked to this. It is probably a good starting point, but once your body gets used to that, which it will, shuffle things around by doing lower reps, or maybe even higher reps. There is no science to this.....to find what works best for you, it is a trial and error process. And many times what works best is a mixture of sets and reps. Sounds confusing but you will get the hang of it. If you want to discuss more, just PM me.
On off days, do some form of cardio. There is no set rule of what form of exercise you should follow for this, but best bet is to pick an exercise you enjoy. If you like running outside, go for it. If you like swimming, hop in the pool. You get the idea. Everyone responds differently to all forms of exercise. Shoot for 20-60 minutes of cardio per session. If you want, start with 20 and if you are not getting the desired results, start bumping it up in 10 minute intervals per session until you start seeing results. If that still is not working, increase the days per week you are doing cardio or increase the intensity, which can be done through many aspects such as speed, incline, etc. I recommend following a HIIT routine. If you are unsure what this is, please do a search on the web, or on this forum for HIIT. This post is already way to long!
These are the main components you need to include. Just keep in mind that the main mistakes I see people make is that they way under eat, focus too much on cardio, and follow ridiculous routines for weight training that were never meant for the physiologically average human being.