Information in this blog was taken from Jillian Michaels’ article, “Making the Cut.”

Split Routines: Focusing on different muscle groups during workouts, rather than hitting all muscle groups in a single workout.

Super-Sets:  Performing two different exercises, one after another, with no rest period. 
There are two categories of super-sets:
1) Same muscle group
2)  Antagonist (or opposing muscle groups)

Combo-Lifting: Combining two or more lifts into one exercise.
There are three different methods of combo-lifting:
1) Straight Combo-lift:  two lifts performed one after another (example: squat then shoulder press)
2) Complexes:  Three or more lifts performed in one exercise.
3) Hybrid-lifts:  Two or more exercises in one movement such as a lunge while doing biceps curl, or a squate while doing a shoulder press at the same time.

Pyramids:  Using a calculated and steady increase of weight based on a person’s one rep max. 
For example,
The first week a person may lift 55% of 1RM (12-15 reps), 60% of 1Rm (8-10 reps) and 65% of 1Rm (6-8 reps). 
The second week, 60% of 1RM (12-15 reps), 65% of 1RM  (8-10 reps) and 70% of 1RM (6-8 reps). 
The third week, 65% of 1RM (12-15 reps), 70% of 1RM (8-10 reps) and 75% of 1RM (6-8 reps). 
The fourth week, 70% of 1RM (12-15 reps), 75% of 1RM (8-10 reps) and 80% of 1RM (6-8 reps). 
After about four weeks of this progression, they would then find a new one rep max and start over with the same %1RM and reps format.

Reverse Pyramid: It is the same concept as the pyramid technique, but in reverse.  This would mean the person would lift heavier to lighter instead of lighter to heavier per week.

Circuit Training: Helps to build lean muscle while simultaneously improve aerobic fitness.  It is a series of exercises, one after another, with no rest period. The circuit is carefully designed, so that a muscle group is resting while another is working. Circuit training can be performed doing all resistance training, all cardio training or a combo of resistance and cardio.

Interval Training: Time periods of high-intensity followed by low-intensity cardiorespiratory exercises. This works both the anaerobic and aerobic systems. 

Plyometrics: Explosive and power training such as jumping, hopping and bounding exercises. It is also known as jump training. Plymetrics is high-intensity, advance and sport-specific training.