Straight start is a term used in the field of orthopedics. It refers to a technique used to reduce the risk of injury when starting a physical activity. The technique involves gradually increasing the intensity of the activity over time, rather than starting at full intensity. This helps to reduce the risk of muscle strain and other injuries. Ortho is the five-letter abbreviation for orthopedics, which is the medical specialty that deals with the diagnosis, treatment, and prevention of musculoskeletal disorders.