Biofeedback. Female hand with attached sensors for heart rate measurement. Biofeedback is a complementary health improvement technique used in some health centres. | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / MICROGEN IMAGES |
Modell-Rechte: | vorhanden |
Eigentums-Rechte: | vorhanden |
Restrictions: | - |