21 DAY SPINAL STRENGTH PROJECT 21'4'10 21 x 10 minute dumbbell postural strength sessions - start anytime, repeat- step one choose your fitting dumbbell weight (3 x 10 overhead press) step two press play following each repetition safely Set 1 Set 2 Set 3 Set 4 Set 5 Set 6 Set 7 Set 8 Set 9 Set 10 Set 11 Set 12 Set 13 Set 14 Set 15 Set 16 Set 17 Set 18 Set 19 Set 20 Set 21