Of course cells and tissues react to external stimuli, that's part of the homeostasis process, and a fundamental part of our adaptivity or we'd die with minimal changes in the environment. Calling it memory is the same as saying a bruise is my body having a memory of me hitting the corner of the table. Well toned bodies are the memories of the weight lifting exercises they've performed in the past, and so on.

But I can only imagine the extrapolations that alternative medicine people will make with this.