I never count the timing.
This is for AB muscle, you have to do it slowly, don't be hasty, and avoid swinging your torso.
I never count the timing.
This is for AB muscle, you have to do it slowly, don't be hasty, and avoid swinging your torso.
• this one -3-D- ♂ (146 bytes) () 01/11/2019 postreply 07:27:59
• About 6-7 times in 20 seconds -HenryLi- ♂ (0 bytes) () 01/11/2019 postreply 07:36:27
• 也太快了, 越慢效果越好吧? -3-D- ♂ (0 bytes) () 01/11/2019 postreply 07:40:06
• Yes, but can't go too slowly -HenryLi- ♂ (0 bytes) () 01/11/2019 postreply 07:46:04