Routines will vary due to such things as time, availability of equipment and skill level of the lifter. Evaluate yourself and your environment to determine what routine will be best. To reduce the risk of injuries and produce balanced muscle development, you must strengthen the major muscle groups. 12 key groups are your quadriceps, hamstrings, calves, pectorals, trapezius, lats, erector spinae, deltoids, triceps, biceps, abdominals and gluteus. If you train some muscles and exclude others you may get poorer overall results and perhaps eventually muscle injuries.
Exercises can be either body part or structural.
In a body part exercises you usually isolate a muscle . In structural exercise you use many muscles to produce a movement . Remember that every time you change the order of an exercise you functionally change that exercise. You can also change that exercise as you cycle through the year. The order of the exercise will affect the severity of the workout.