plank challenge - day 9 (5 set with 30 sec rest)
We will count the time every 10 seconds. Work out while listening to it comfortably.
If resting time is long, touch the empty space on the right side of screen twice quickly to go back 10 seconds previous :)

플랭크 30일 챌린지 | 9일차 타이머 (1분 5세트, 30초 휴식)

플랭크 30일 효과(한달 후 복근 변화)
홈트, 맨몸운동, 헬스, 플랭크 방법
여자 11자 복근
plank day30 workout(1month ABS change results)
home exercises, belly fat workout, how to do plank
woman ABS core, plank of the week

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