You should also have everything you need for simple workouts. Especially if you plan to hit the gym nearly every day, it's a good idea to have some equipment for those rainy days when leaving the house isn't an option. And let's face it: Buying some basic workout items will make your jump into the fitness world more fun. This might sound trivial, but having clothes you like can influence your desire to train.
The Russian twist is a type of exercise that is used to work the abdomen muscles by performing a twisting motion on the abdomen. This exercise is performed sitting on the floor with knees bent like in a "sit-up" position with the back typically kept off the floor at an angle of 45°. In this position, the extended arms are swung from one side to another in a twisting motion with or without weight.

One new exercise is added to each bodypart routine to provide even more angles from which to train your target muscles to promote complete development. You’ll hit each muscle group with two exercises of 3­–4 sets each: four sets for large bodyparts (chest, back, shoulders, quads, hamstrings) and three sets for smaller bodyparts (biceps, triceps, abs, calves). The result is 16 total sets for the week for large bodyparts and 12 sets total for smaller ones—again, working in the 8–15-rep range—which is a substantial increase in volume from Week 1.
Resistance training or lifting weights is a common practice in the world of people who want to get bigger and stronger. To someone who wants to lose weight, it could seem almost counterproductive to put on muscle weight when your true goal is to lose weight. The truth of the matter is that you want to lose fat, and putting on muscle can help you accomplish that goal.
Before you changed your outlook on fitness, you might have had no problems consuming a large bag of potato chips or super-sizing your combo at McDonald’s or Burger King—but what you don’t see can actually hurt you. What Reps! is referring to is cholesterol. Cholesterol—both good and bad—is talked about a lot, but few people really understand what it does, where it comes from and what they should be concerned about. Let’s try to clarify some of these issues by taking a closer look at the facts on cholesterol.
In the third week of the program we step it up to a three-day training split: Train all “pushing” bodyparts (chest, shoulders, triceps) on Day 1; hit the “pulling” bodyparts (back, biceps) and abs on Day 2; and work your lower body (quads, glutes, hamstrings, calves) on Day 3. As in Week 2, you train each bodypart twice a week, so you’ll hit the gym six days this week.
In recent years, the related areas of fitness and figure competition have increased in popularity, surpassing that of female bodybuilding, and have provided an alternative for women who choose not to develop the level of muscularity necessary for bodybuilding. McLish would closely resemble what is thought of today as a fitness and figure competitor, instead of what is now considered a female bodybuilder. Fitness competitions also have a gymnastic element to them. A study by the Clinical Journal of Sport Medicine found that female bodybuilders who are taking anabolic steroids are more likely to have qualified for substance dependence disorder, to have been diagnosed with a psychiatric illness, or to have a history of sexual abuse.[14]
Crunch on exercise ball: Sit on the ball with your feet flat on the floor. Let the ball roll back slowly. Now lie back on the ball until your thighs and torso are parallel with the floor. Cross your arms over your chest and slightly tuck your chin in toward your chest. Contract your abdominals, raising your torso to no more than 45 degrees. For better balance, spread your feet wider apart. To challenge the obliques, make the exercise less stable by moving your feet closer together. Exhale as you contract; inhale as you return to the starting position.
For example, I had some nagging tendinitis in my brachioradialis (forearm muscle) and doing hammer curls was unbearable. So, I swapped those in for standing alternating dumbbell curls, preacher curls, and standing cambered bar reverse curls with light weight. For shoulders, I have a slight tear in my left shoulder and when it's aggravated, I avoid all pressing movements all together. Focus on side/front laterals and rear delt movements. As for knees, not allowing my knees to come out pass my toes on squats takes the pressure of the part of my knee that gets sore. Also, a few minutes on the Stairmaster Stepmill is a good way to get the knee joint warmed up and ready for work. 
Learn to isolate specific muscles. Steady, controlled movements are the key to learning what it "feels like" to work a specific muscle or muscle group. It takes about three weeks for the novice to maximize the neuromuscular coordination necessary to identify and fully recruit muscle fibers from individual muscle groups. At this stage, you will be able to efficiently target these groups and minimize cheating with sympathetic muscles. This will also enable you to use virtually any unfamiliar piece of gym equipment (and invent your own exercises) simply by duplicating the appropriate "feel" when trying a new exercises for the same body part.
Bodybuilders often split their food intake into 5 to 7 meals of equal nutritional content and eat at regular intervals (e.g. every 2 to 3 hours). This approach serves two purposes: to limit overindulging in the cutting phase, and to allow for the consumption of large volumes of food during the bulking phase. Eating more frequently does not increase basal metabolic rate when compared to 3 meals a day.[citation needed] While food does have a metabolic cost to digest, absorb, and store, called the thermic effect of food, it depends on the quantity and type of food, not how the food is spread across the meals of the day. Well-controlled studies using whole-body calorimetry and doubly labeled water have demonstrated that there is no metabolic advantage to eating more frequently.[38][39][40]
The most important aspect of your bodybuilding diet is calorie intake. To build mass, you need between 20 and 22 calories per pound of body weight each day, according to sports scientist Jim Stoppani. This would mean a 150-pound beginner bodybuilder would need between 3,000 and 3,300 calories per day to gain weight. Stoppani advises reducing your intake slightly on nontraining days, though, as you're less active. On these days, aim for 18 calories per pound, meaning the 150-pound bodybuilder would need 2,700 calories on rest days.
According to The American Council on Exercise, not all females have equal capacities for gaining muscle. Genetics play a key role. For example, females who have a mesomorphic body structure, which features natural muscularity, have an advantage over ectomorps and endomorphs. Also, some females have higher levels of testosterone than others, which gives them an advantage in developing muscle. Despite these genetic differences, most women will experience a 20 to 40 percent increase in strength after several months of strength training, states The American Council on Exercise.

Note the flexibility here. If you're an experienced casual lifter starting an organized program, you may be able to kick off with 3 X 12 from the beginning. If you are new to weights and have some fitness issues, you should start with one set and progress slowly. Doing only 1 set of 9 exercises will not take too long, perhaps only 30 minutes with warmup included. Doing an extra 20 minutes or more of cardio before or after weights would be time well spent at this stage. Once you reach full stretch in the program, aerobic training may be better done before weights or at a separate session.

You’ll begin the program with a full-body training split, meaning you’ll train all major bodyparts in each workout (as opposed to “splitting up” your training). Train three days this first week, performing just one exercise per bodypart in each session. It’s important that you have a day of rest between each workout to allow your body to recover; this makes training Monday, Wednesday and Friday—with Saturday and Sunday being rest days—a good approach.

The amount of exercises and sets a bodybuilder would use would vary among each individual. Some bodybuilders, like Arnold Schwarzenegger and Sergio Oliva, would do multiple exercises and sets for each muscle group to insure that the muscle was being properly trained from each angle. They would normally do up to 5 sets per exercise and 4-5 exercises for each muscle group for a total of 20-25 sets for each body part.
Bodybuilders got into shape for competitions by both adjusting their diets and increasing the intensity of the workout. The high volume trainers would burn an incredible amount of calories just by the sheer amount of work performed at each training session. Many bodybuilders would increase the frequency of their training as the contest got closer, doing a double split routine for the last twelve weeks before the competition. A double split routine would include two training sessions per day, one in the morning and another workout about eight hours later in the late afternoon or early evening.
Pros: This technique not only allows you to do more work in a shorter period of time but it also creates an incredible pump (especially when you pair antagonistic exercises), and it helps burn fat by elevating the heart rate to the fat burning zone (which also improves your cardiovascular conditioning). Finally, you can use this technique all the time.
JDB, great tip on cardio before weights. Having trained in a boxing gym for years, this is exactly how I would start each training session, even if I was going to focus on weights that day. Use to start off, 3-4 rounds on jump rope in the ring, alternating between fast high knees and then slowing it down. It was all continuous for about 10-12 minutes. Would then continue w basic calisthenics (mountain climbers, bw squats, burpees, etc.) for another 3-4 rounds. This was all done w boxing timer running in background. Would finish “warm-up” w some kind of pull-up/chin-up, dips, and hanging abdominal work. Then it was time for weights. This just overall improved my general conditioning/movement and never felt that my strength diminished when doing this. Actually, felt stronger due to increased blood flow.