Introduction – Ergonomic model – Aim Demands – Physical – – Mechanical – Physiological — Aerobic and anaerobic Profiling (Field or laboratory) – Anthropometric – Aerobic/ Anaerobic — Strength — Speed/ Power — Repeated activities — Aerobic — Blood profiling — Piulmonary Training considerations – Generalised – Specific training – Training load Selection – Generalised criteria for selection for success – Sociological Conclusion