Speakers adapt their speech to their interlocutors and when they talk to an elderly person, they tend to engage in elderspeak. In this paper, we explore with a new approach how caregivers adapt their use of gesture space in a vocabulary explanation task with older and younger adults. Preliminary results on one caregiver show that she tends to occupy a larger gesture space when speaking to a senior than when addressing a younger partner. Thus, caregivers could spontaneously accommodate their discourse and their gestures to help interlocutors when they have difficulties or when caregivers think seniors have difficulties.