https://www.youtube.com/watch?v=SFicccDgjUI
What do you guys think are prerequisites for achiving nice form of lever pullups. I can hold straight front lever for 5 seconds and yesterday I injured my back (higher part where slightly below shoulders on left side) when I tried to do 3 front lever pull-ups. I am otherwise followin now foundation 1 for 3 months and I do regular street workout 5 days a week, mostly on gymnastic rings and paralel bars.
all the best