5 Muscles Nobody Trains

Mindset comic · April 10, 2026 · 6 slides

This guide highlights five commonly neglected muscle groups that are essential for balanced physical development and injury prevention. It covers the tibialis anterior, rear delts, neck, forearms, and adductors, explaining the functional and aesthetic benefits of training each. Incorporating these muscles into a workout routine can improve posture, running endurance, and overall body symmetry.

The GainFrame mascot looks through a magnifying glass at his arm, introducing the five commonly neglected muscles that people should train.
Gainframe Guy. 5 muscles nobody trains.
The GainFrame mascot sits on a bench and lifts a kettlebell with his foot to demonstrate how training the tibialis anterior prevents shin splints.
1. Tibialis Anterior. The shin muscle. Train this to stop getting shin splints when you run.
The GainFrame mascot stands with hunched posture while holding a red resistance band, showing that neglecting rear delts leads to poor posture.
2. Rear Delts. Doing 100 sets of bench press without training these ruins your posture.
The GainFrame mascot admires his muscular neck in a mirror, highlighting how neck training makes you look more jacked in a t-shirt.
3. The Neck. Looks weird to train, but it makes you look way more jacked in a t-shirt.
The GainFrame mascot struggles to carry two buckets of water with disproportionately large biceps and skinny forearms, illustrating the importance of forearm training.
4. Forearms. Having huge biceps with skinny forearms looks ridiculous.
The GainFrame mascot uses a leg press machine with literal chicken legs, warning that skipping inner thigh training results in weak-looking legs.
5. Adductors. Skip the inner thigh and your legs will always look like chicken legs.

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