1. Dept. of Mining Technology- Topography and Structures- Universidad de León- Ponferrada (León), Spain
2. Dept. of mechanical engineering- Universidad de Salamanca- Campus Viriato- Zamora, Spain
3. Lab. of Applied Physiology (FISAP)- Dept. of Nursing and Physiotherapy- Universidad de León- Ponferrada (León), Spain
4. Dept. of Biomedical Sciences- Universidad de León- Ponferrada (León), Spain
5. Lab. of Applied Physiology (FISAP)- Inst. of Biomedicine (IBIOMED)- Universidad de León- Ponferrada (León), Spain