Stand with one foot directly in front of the other, heel-to-toe, as if on a tightrope. Hold 30 seconds, swap front foot. A harder balance progression than single-leg — narrows your base of support without lifting a foot.
Secondary muscles
glutes
calves
Form cues
1Touch toes to heel — no gap, no overlap
2Arms out for balance, eyes forward
3Switch front foot each set
Common mistakes
⚠Letting the feet drift apart for stability (defeats the drill)
⚠Looking down — proprioception trains by feel, not sight