A: Deltoids
The muscle group located on the upper arm at the outside of your shoulder.

Exercises
16: Lat Pull
20: Pectoral Press
26: Behind the Back Press
27: Underhand Pitcher
28: Upward Rotator
29: Overhead Elbow Squeeze
30: Abdominal Crunch
31: Bench Press
32: Incline Bench Press
33: The Inventor's Choice

B: Pectoralis Major
These are your chest muscles, and extend from your collar bone to just below your breasts.

Exercises
21: Elbow Squeeze
22: Overhead Pitcher
23: Inward Roll
24: Straddle
25: Inverted Straddle
26: Behind the Back Press
27: Underhand Pitcher
29: Overhead Elbow Squeeze
30: Abdominal Crunch
31: Bench Press
32: Incline Bench Press
33: The Inventor's Choice

C: Biceps
These muscles are located on the front of your upper arm.

Exercises
3: Supinator
6: Reverse Hand Extensor : The Curl
9: Overhead Curl
10: Underhand Curl
11: Side Curl
12: Chest Crank

D: Hand Extensors
The muscles on top of your forearm, to the left of the bone. These muscles are known as your hand extensors.

Exercises
2: Hand Extensor
3: Supinator
6: Reverse Hand Extensor
7: Full Roll
12: Chest Crank
21: Elbow Squeeze
22: Overhead Crunch
29: Overhead Elbow Squeeze

E: Hand Flexors
With your right hand out, palm left. The muscles on the underside of your forearm to the left of the bone. These are used in "flexion" of your hand.

Exercises
1: Horizontal Pronator
4: Pronator
5: Forearm Rotator
7: Full Roll
8: The Curl
9: Overhead Curl
10: Underhand Curl
11: Side Curl
13: Cross Extensor
14: Triceps Extensor
15: Short Extensor
19: Overhand Pitcher
23: Inward Roll
24: Straddle
25: Inverted Straddle

F: Abdominals
These are the stomach muscles.

Exercises
30: Abdominal Crunch
31: Bench Press
32: Incline Bench Press
33: The Inventor's Choice

G: Teres Major
These back muscles extend from the top of your shoulder to just below your shoulder blade.

Exercises
16: Lat Pull
17: Lat Extensor
19: Overhand Pitcher

H: Triceps
These muscles are located directly behind the biceps of the back of your upper arm.

Exercises
13: Cross Extensor
15: Short Extensor
19: Overhand Pitcher

I: Latissimus Dorsi (Lats)
Primary back muscles. They extend in a triangular shape from the center of your back to just below the neck, about three-quarters down.

Exercises
16: Lat Pull
17: Lat Extensor
19: Overhand Pitcher