Flexing your lats is an important part of posing during a bodybuilding competition. Doing it correctly allows you to demonstrate the development of your muscles and show off your proportions and the symmetry of your figure. It can also help you stretch out before or after a workout.

Is flexing bad for muscle growth?

Muscle flexing with isometric exercises is one way to help build muscle strength. ... Because muscle flexing doesn't help improve range of motion or flexibility, these exercises should be part of a more comprehensive resistance-training program.

Is flexing good or bad?

It's not necessarily bad to flex your stomach or abdominal muscles all day, but there are probably more effective ways to strengthen this area. Also, people sometimes hold their breath while flexing, so flexing all day could disrupt your normal breathing patterns.