Are ther any exercises for waist?
Yes. The core is waist.
What do you want to do with waist? Tighten or tone?
4 mins is amazing. Remember to challenge your muscles also with different exercises: side planks, plank dips, bird dogs... there's a lot of great exercises
No Equipment Necessary Tabata WorkoutPrime Transformation 4 Minute Workout Before DrivingKISS YOUR ASS GOODBYE *SkSwitch It Up! Abs *ETotal Body Minute Circuit (MV)Plank Or Die [JY]
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