You're either a leg bouncer or someone who gets intensely annoyed by leg bouncing. There's seldom an in-between.
Leg bouncing, also called leg tapping, leg jiggling or leg shaking, describes the habit of moving one leg up and down at speed while siting. It can happen when sitting on public transport, or at home, watching TV. It can be unnoticeable or powerful enough to make the whole bank of desks in the office feel the shakes.
I'm a leg bouncer. It can be going for ages without me noticing, until I can suddenly feel the shakes all along my desk. I've noticed other people bouncing legs too, so it's clearly not a habit that's easily ignored (忽视).
Why does leg bouncing happen? Why is it more common among those experiencing anxiety? "When we are feeling anxious, our body thinks that we're in danger and prepare us to fight the stress, or run away from it." Dawn Templeton says, "This means we are full of extra energy. Our muscles become busy working and that often leaks out (泄露) in the form of foot or hand shaking."
Leg bouncing can be a way to feel calmer, helping you feel more relaxed when you're experiencing high levels of stress. You can also be more likely to shake legs if you're a "high energy" person.
The good news is that there's no evidence (证据) to suggest leg shaking does your body any harm, beyond possibly making your muscles a bit painful. The habit is unlikely to cause any long-term damage to our posture, leg, or spine (脊柱).
The only real negative outcome of your leg bouncing is the annoyance it can cause to others.