When a lizard repeatedly raises and lowers the front of its body, it can look exactly like a tiny push-up workout. In many species, especially anoles, the movement is actually part of a visual communication display.
The lizard may be warning a rival, advertising its presence, courting a mate, or doing several of those things at once.
Lizards need signals that work at a distance
Animals do not have to speak to communicate. Movement, posture, color, scent, and sound can all carry information.
For a small lizard sitting on a tree trunk, fence, rock, or patio chair, a repeated up-and-down movement is easy for another lizard to notice. The display can make the animal look more active and conspicuous without requiring direct physical contact.
That is useful because fighting is expensive. If two animals can settle a territorial dispute with a display instead of an injury, both have something to gain.
Anoles often combine push-ups with a dewlap display
Male anoles are famous for extending a flap of skin beneath the throat called a dewlap. Depending on the species, the dewlap may be brightly colored.
The push-up motion and dewlap extension can work together as a visual signal. A male may climb to a noticeable perch, raise and lower his body, extend the dewlap, and effectively announce that the area is occupied.
It is a small reptile version of putting up a billboard.
The display can be territorial
Male anoles defend areas that may contain food, shelter, good perches, and access to females. A rival entering that space may trigger more intense displays.
Body posture, head bobbing, push-ups, dewlap movements, and approach behavior can all escalate as two animals assess one another.
If neither backs down, the interaction may become physical. The display is therefore not meaningless exercise. It can be part of a negotiation about who gets to stay.
Push-ups can also be part of courtship
The same general display system can be used when males interact with females. Courtship behavior varies by species, but visual movements help identify the animal, attract attention, and communicate reproductive status.
That overlap is common in animal behavior. A signal that says “look at me” can be useful in both competition and courtship.
Do female lizards do push-ups too?
In some species, females also perform visual displays, although the frequency and meaning may differ from male behavior. Species, age, social setting, and individual conditions all matter.
That is why it is risky to treat every lizard push-up as one exact sentence.
It is more like a category of body-language signals.
Why climb high before doing it?
A high or exposed perch makes a visual signal easier to see. A lizard displaying from the top of a fence post or patio chair may simply be choosing a better broadcasting location.
This also explains why homeowners sometimes feel as though the lizard is performing specifically for them.
It probably is not.
You are just standing near the stage.
Is the lizard exercising at all?
Any movement uses muscles, so technically the lizard is getting some exercise. But exercise is not the main reason for the repeated display.
The behavior exists because it communicates.
So when a lizard appears to be doing a set of push-ups in the sun, there is no need to feel lazy.
It is probably not training.
It is arguing, flirting, advertising, or some combination of all three.
A related animal question is Why do animals have tails?, which shows another way biology shapes familiar behavior or anatomy.
And that’s the short explanation.
Related explanations: Why do animals have tails? and Why do rabbits thump their feet?