The exercise method of my thin thighs and calves is to lift my legs.
Stand up straight, one leg does not move, the other leg is lifted sideways, the leg should be straightened, and the other leg is lifted 25 times. This exercise can be done at home or in the office at any time. If there is loose meat in the front or back of the leg, kick the leg forward or backward.
The exercise method of the inner thigh is different: stand, spread your legs as far as possible, then straighten one leg and bend the other, and do a lunge. Note that the key action is to keep the soles of your feet facing straight ahead. 60 lunges.
There is swimming, but I swim less, once a week at most.