'健身球有唔同種類，當中Ballast Ball（穩定球）就有沙粒增加球體重量同不穩定性，特別適合訓練肌肉同功能性訓練！想知道點玩？即睇教練Dorian嘅示範啦！  There are different types of Fitballs at the gym, one of them being the Ballast ball. It is loaded with sand like material to increase its weight and instability, hence a great tool for strength and functional training. Our personal trainer Dorian will show you how to workout with it.' 

Tags: #Workout , #FitnessFirstHK , #GymInHongKong , #PT101 , #BallastBall

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