Dataset Analysis

Coverage summary

The PlainExercise database currently contains 873 exercises spread across 18 muscle groups and 15 equipment types. Because most exercises are tagged to more than one muscle (a primary target plus secondary involvement), the muscle breakdown totals 2,576 muscle-tag assignments, an average of 143 exercises per muscle group. The equipment breakdown totals 798 equipment-tagged exercises, an average of 53 per equipment type.

Coverage is not uniform. The five largest muscle groups account for a disproportionate share of the exercise catalog. Bodyweight, dumbbells, and barbell exercises dominate the equipment distribution. This skew reflects the underlying source datasets and the reality that common muscle groups and equipment have much more documented exercise variety in the literature.

Muscle coverage distribution

Ranked by exercise count, the muscle distribution shows a steep tail: the top few muscle groups have 100+ documented exercises, while smaller muscles (neck, forearms, calves) have 20-50. This is consistent with how resistance-training literature typically allocates attention.

Practical implication: if you want to train a well-covered muscle group, you have abundant variety. If you want to train an under-represented muscle, the database will offer fewer direct options, you may need to rely on secondary-muscle contributions from compound lifts rather than direct isolation work.

Equipment coverage distribution

Equipment distribution follows a similar long-tail pattern. Bodyweight-only exercises are the most numerous, followed by dumbbells, barbells, and cables. Niche equipment (resistance bands, kettlebells, medicine balls) has narrower catalogs.

Practical implication: for home trainees, the highest-coverage equipment (bodyweight, resistance bands, dumbbells) unlocks the broadest range of movement options. Specialty equipment has a narrower footprint in the data, use it for specific patterns rather than as your primary tool.

Level and mechanic distribution

Exercises are classified by level (beginner, intermediate, expert) and mechanic (compound, isolation). The overall distribution leans toward beginner and intermediate variations, with fewer expert-level movements. Compound movements slightly outnumber isolation movements in the catalog, reflecting the taxonomy of common strength training.

Practical implication: beginners will find abundant material to work with. Advanced trainees will find fewer expert-level options and will often need to progress an intermediate exercise with harder parameters (tempo, load, stability) rather than selecting a new exercise.

Known gaps

Relative to an ideal complete exercise taxonomy, the current catalog under-represents:

• Athletic plyometrics and power work - box jumps, medicine-ball throws, speed drills.
• Rehabilitation and prehabilitation exercises - specific pre-surgery and post-surgery movements.
• Mobility and flexibility work - beyond basic stretches, the catalog is thin on dedicated mobility protocols.
• Sport-specific movements - the catalog is general-purpose, not specific to any sport.
• Gymnastics-style skills - muscle-ups, handstands, levers, rings variations are under-represented.

We document what the source datasets cover. These gaps reflect the upstream corpora, not editorial choices. For the gaps above, we recommend supplementing with specialty resources.

Methodology

All counts on this page are computed live from the PlainExercise database. Numbers update automatically when the underlying dataset is refreshed. See the methodology page for the full data process and the about page for editorial and publisher information.