: Picturing the target muscle—like the long head of the biceps during a curl—has been shown to increase physical gains by ensuring you aren't compensating with other muscles.

: Without an anatomical roadmap, you might overtrain the "mirror muscles" (chest and abs) while neglecting the stabilizers like the traps and rhomboids, leading to poor posture. The Major Players: Breakdown by Muscle Group

: Side-to-side movements (e.g., lateral lunges, jumping jacks).