Super-high-reps (20 to 30) are good for what?

[Nitrox]

Good for connective tissue. Some of us have to prioritize keeping the body together...

 

[Powerhouse 48]

high reps will generate red muscle fiber growth and lead to some added mass, but no white muscle fiber gains and thus little to no strength

 

[brittishbulldog]

there good for endurance training, and anything that needs good endurance

 

[brittishbulldog]

*agree*

great for shock cycles of hypertrophy, any more than 2-3 workouts is just athletic conditioning (i.e. not useful for bbing).

anything that is a change in the sort of training will help hypertrophy but not to often, however high reps are very good for endurance training and events,

 

[EvilGenius]

High reps are actually good for building and forming new capillaries. The more capillaries your muscles have the more blood flow there is to the muscle during heavy sets....hence a better pump with fewer reps and heavier weights.