Data and Category Comparison in Catalog Exercises

Entries with Bodyweight and Optional Mat Equipment

In the catalog entry sheets, a substantial group of entries lists the equipment combination of *No Equipment (Bodyweight)* and *Exercise Mat (Optional)*. Despite sharing this identical equipment specification, the individual entry sheets show distinct differences in their assigned categories and primary muscles.

Looking at the Plyometrics category, the entry sheet for the Standing Hands-on-Hips Crunch lists the *External Oblique* and *Rectus Abdominis* as primary muscles. The Standing Air Bike Twist is also included in this category, sharing the *External Oblique* as a primary muscle with the previous entry, but listing the *Rectus Femoris* instead of the *Rectus Abdominis*.

Examining other categories that record the same base equipment:

• The entry Standing Overlapping Arm Lift is classified under Chest and lists the primary muscles as *Pectoralis Major* and *Anterior Deltoid*.
• The sheet for the Standing Wall Triceps Stretch belongs to the Stretching category and pairs the *Triceps Brachii* and *Posterior Deltoid* as primary muscles.
• The Side Plank Elbow-to-Knee Crunch (Left) is associated with the Abs category, recording the *External Oblique* and *Rectus Abdominis* among its primary muscles.
• The entry Lying Quadriceps Stretch falls into the Legs category and documents the primary muscles as *Rectus Femoris* and *Quadriceps Femoris*.

Within this same equipment group, there are also two entry sheets featuring the term landmine in their titles:

• The Landmine Front Squat, placed in the Legs category, lists the *Quadriceps Femoris* and *Gluteus Maximus* as primary muscles.
• The Landmine Lateral Raise, placed in the Shoulders category, lists the *Lateral Deltoid* and *Deltoid* as primary muscles.

Entries with Dumbbells, Machines, or Weights

A second group of entry sheets within the catalog requires specific equipment explicitly indicated in their respective description fields, such as dumbbells, lever machines, or weight stacks.

The sheets that report the exclusive use of Dumbbells cover different categories and primary muscles:

• The Dumbbell Reverse Lunge is classified under Legs and assigns its primary muscle fields to the *Quadriceps Femoris* and *Gluteus Maximus*.
• The Dumbbell Seated Neutral Grip Shoulder Press belongs to the Shoulders category and lists the *Anterior Deltoid* and *Triceps Brachii*.
• The Dumbbell Seated One-Arm Neutral Wrist Curl is placed in the Forearms category, recording the *Wrist and Finger Flexors* and *Pronator Teres* as primary muscles.

Conversely, the sheet for the Lying Machine Leg Curl also belongs to the Legs category, but it is the only one in the group to list the equipment combination of *Lever Machine* and *Weight Stack or Plates*. Regarding primary muscles, its entry specifies *Hamstrings* and *Biceps Femoris*.

Direct Comparison of Muscle Parameters and Categories

Comparing the data provided across the various entries reveals specific overlaps and differences between categories and target muscle groups: - The Legs category contains four distinct entries: Lying Quadriceps Stretch, Landmine Front Squat, Dumbbell Reverse Lunge, and Lying Machine Leg Curl. While the Landmine Front Squat and Dumbbell Reverse Lunge share the exact same primary muscles (*Quadriceps Femoris* and *Gluteus Maximus*), they differ in reported equipment. The Lying Machine Leg Curl lists *Hamstrings* and *Biceps Femoris*.

• In the Shoulders category, the Dumbbell Seated Neutral Grip Shoulder Press indicates the *Anterior Deltoid* and *Triceps Brachii*, whereas the Landmine Lateral Raise indicates the *Lateral Deltoid* and *Deltoid*.

- Regarding the *External Oblique*, this muscle appears as a primary muscle in both the Standing Hands-on-Hips Crunch and Standing Air Bike Twist sheets (both under Plyometrics), as well as in the Side Plank Elbow-to-Knee Crunch (Left) sheet (under Abs).

• The *Triceps Brachii* is registered as a primary muscle in both the Standing Wall Triceps Stretch (Stretching category) and the Dumbbell Seated Neutral Grip Shoulder Press (Shoulders category).