You already brush your teeth twice a day. Stand on one leg while you do it and you’ve added four minutes of balance work to every day of your life without finding a single extra minute.
Morning: left leg. Evening: right leg. Or switch halfway through each brush — whatever you’ll actually remember. Barefoot is best; the little muscles in your foot do the work shoes normally do for them.
This is quietly serious training dressed as a joke. Single-leg balance is the base under cutting, landing, and shielding — and steady ankles and feet are part of what keeps growing knees and heels happy. The bathroom just happens to be where two spare minutes live.
Keep it honest. Standing leg soft at the knee, not locked. Hips level. If you wobble and touch down, fine — back up and carry on. Wobbling is the exercise.
Mind the floor. Dry floor, and stay close enough to the sink to catch yourself. A bathroom is the one place not to be a hero.
progression. when a full brush feels easy: close your eyes (hand near the sink first — it’s much harder than it sounds), or stand on a folded towel, or add a slow calf raise on the standing leg between rinses.
background: the minutes nobody schedules