完成一个leg raise，你花多长时间?

所有跟帖： 

• Are you talking about hanging leg raise like this one: -HenryLi- ♂ (268 bytes) () 01/11/2019 postreply 06:59:01

• 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

• why? -3-D- ♂ (0 bytes) () 01/11/2019 postreply 07:53:07