According to US Weekly, Christina Aguilera Lost 40 pounds in 4 months but usually women do tend to lose at least 10 pounds (weight of baby, placenta & amniotic fluid) after giving birth so here's what Christina Aguilera did to lose her 30 or less pounds after having a baby.Christina Aguilera's Workout plan: Christina did 90 minute vigorous workouts with her Personal Trainer 5 days a week and she only started this workout 6 weeks after having her son due to doctors orders.Christina's 90-minute workout.Her workout began with 40 minutes of intervals on a treadmill or elliptical and then Christina did 40 minutes of various toning exercise like bicep curls, chest presses, push-ups, lunges, and ab exercises usually for 3 sets of 8-to-12 reps and she finished up with her workout with 10 minutes of stretching and here's another good tip? Christina's Personal Trainer who is Tee Sorge didn't have her doing the same toning or body sculpting exercises each workout - Tee Sorge changed the workouts every session to prevent plateaus to keep the results coming in.Christina Aguilera was born on December 18, 1980 is an American singer, songwriter, television personality, and actress. She is best known for her roles in Tony Bennett: An American Classic, Get Smart, Get Him to the Greek and Burlesque. She gained a lot after she gave birth to his son, Max but she was able to lose forty pounds of it. She has excelled in all the segments of her life and continues to do so. Apart from this, She is also known for her fit body and healthy life-style, which some say is the secret for all her energetic stage performances. Her fitness training.Height: 5 ft 1½Weight: 68 kg (150 pounds)Measurements: 38-22-33Her workout also consists of:She does boxing, dancing, cardio workouts plus weight lifting to stay fit and lean. She follows an exercise program made by her personal trainer. They said program involves 3 sessions a week for 50 minutes, preferably done every 2 days. The fitness program includes 6 minutes of warm up that involves sequence of easy movements to increase the cardiac rate and prepare the muscles. Next is the 36 minutes of dance wherein shes having fun while burning the calories. - See more at: Lastly, 8 minutes of cool down stretch that helps in decreasing the heart rate plus muscle stretching to improve her flexibility. She starts her strength training sessions with a 10 minute warm up on the treadmill. Its a great way to get the blood pumping before lifting weights. Get your heart rate up with my treadmill workout for beginners or the more advanced.Hit The TredmillBefore Christina starts her workout, she likes to increase her heart rate so that she can carry forward the momentum into her exercises. The singer does a 10-20 minute walk on the treadmill and on some good days, she even likes to run for 10-15 minutes more.Don't Avoid WeightsWhoever said that weights should be lifted only by men, can go to sleep right away. Your upper body deserves to be toned and flexible, if not muscular and weights go a long way in doing that. Christina works her biceps and triceps by making use of weights from 5 to 20 pounds. She does three sets of each exercise, five times a week.Work Those Abs Christina's Diet SecretsFor Burlesque, Christina had to look extremely toned and yet stylish. She does ab exercises every session without fail. Mind you, what Christina does is not mean feat. She does up to 350-500 reps of sit-ups and other exercises like push-ups and lunges that focus on abs.Get AddictedLearn to teach your body to remember to workout everyday or at least 5 times a week. Christina followed this when she gave birth to her son. In fact, she worked out until she was about 8 months pregnant. This gave her a fresh and confident look and it became her habit post-pregnancy as well.Diet plan Christina Aguilera used to lose weight after having her babyChristina Aguilera ate 1800 calories a day which may seem like a lot for her small frame.Since she breastfeeds her son - Most nutritionist & doctors agree that breast feeding moms need to eat at least an extra 500 calories a day and believe it or not. The act of breastfeeding itself burns a lot of calories and Christina Aguilera herself also credits breast-feeding for helping her shed her post-pregnancy weight."I think they say that when you're breastfeeding, your weight kind of slims down. It's a little easier. It's like a workout within itself. It's very tiring actually and you find yourself snacking more often." - Christina Aguilera telling US TV show Access HollywoodChristina Aguilera's Diet SecretsChristina Sticks to a 6 day a week 1800 calorie diet of protein, veggies, and whole grains which consisted of 3 meals & 2 snacks (see 201 weight loss foods) and Christina has 1 cheat day a week with foods like with chili cheese fries and she admitted to having cravings for candy and she said this while she was losing her post-pregnancy weight?"I'm not into depriving myself, I limit the bad foods that I like." -Christina Aguilera from US Weekly Magazine.Her diet likewise contains a lot of fresh fruits and vegetables together with protein in the form of meat as well as dairy products. She takes in 1800 calories in the form of a healthy diet everyday.Breakfast: Scramble eggs, a whole-wheat English muffin.Snack: Fruits.Lunch: Tuna sandwich on whole-wheat bread.Snack: Cheddar or string cheese.Dinner: Chicken or fish with a large salad.As per HarpersBazaar.com " Christina Aguilera slimmed down with The Fresh Diet, a home delivery meal plan created by a Le Cordon Bleu-trained chef. The program touts a vast menu, with meals like multi-grain strawberry pancakes, mango-stuffed pork loin and key lime cheesecake".Christina Aguilera has one impressive body overhaul. The singer has gradually been slimming down over the past few months not with any crazy fad diet, or insane fasting, but with old fashioned healthy eating and a new exercise regime. Christina first started getting noticed for her trim figure back in May when she performed at the Billboard Music Awards, and it seems she has been sticking to it. Showing off her new body confidence, The Voice judge wore a body con mini pink dress at the NBC's TCA Summer Press Tour over the weekend and she looked amazing.Christina's Diet SecretsOver the past few months, Christina has managed to drop 20 pounds thanks to The Fresh Diet, which boasts a pretty impressive menu that includes dishes like pesto couscous stuffed tomatoes and pork stir-fry! YUMMY!! But if your planning on trimming down like her, you better have some deep pockets because the meal plan costs a whopping $1,394.69 a month!! That's pretty pricey if you ask us, but obviously it's working for her! Of course, the diet isn't the ONLY thing that has contributed to her amazing figure! She's also been spending some extra time at the gym with her personal trainer Tee Sorge and has even started practicing yoga! The 1800 Calorie DietBeing the great singer that she is, Christina needs a lot of energy for her on-stage and off-stage performances. Hence, she needs energy and that is where the 6-day a week diet consisting of proteins, vegetables and whole grains, comes into play. She divides these into 3 meals and 2 snacks. Christina says that ideally she takes in 1800 calories in the form of a healthy diet every day.Never Deprive YourselfThe Moulin Rouge singer believes that keeping herself away from the things she likes to eat, only adds to irregularities in her metabolism. Christina loves fast foods like chili French fries, chicken wings, nachos and cookies like Oreo. She has agreed that she has these foods before stage performances because singing and dancing easily burn off 2000 to 4000 calories in one go.Be ContentOne of the main ideologies of Christinas diet plan is that she does not want to change herself. She knows what her normal body looks like and makes sure she trims some weight if she exceeds the limit. The four-time Grammy award winner believes that being slim is okay for skinny girls because they are like that, but thats not the case with others who want to look like them.Eliminating WhitesAgreed, that Christina eats healthy diet, does regular workouts and even has a positive attitude but she has to sacrifice something to get that fit body. Her secret is cutting all kinds of white diet from her meals and that includes white rice, flours and sugars.Post-pregnancy, Christina had agreed that breastfeeding also helped her lose calories apart from the diet and workout. Though, we dont usually see singers as someone who really need to trim their weight or diet, Christina is a human being and she needs to be healthy too and looking glamorous.Do your cool-downs. After each exercise session, cool down by walking for 5 or 10 minutes and stretching all the major muscle groups.Tell your instructor you're a survivor. If you take a yoga, aerobics, or other exercise class, be sure to talk to the instructor before class and explain that you're a breast cancer survivor. Tell the instructor what you can and can't do and ask for modifications for any movements you can't do. Do the same thing if you work out with a certified personal trainer. Let her or him know that you've been treated for breast cancer so the exercises can be scaled appropriately.

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