Complex sentence: An off-hand weapon is rarely used in modern sport competition; in fact, the use of the off-hand as a defensive measure is often prohibited by the rules of many sport fighting styles that are common in the Western world today.
Split into simpler sentences: An off-hand weapon is rarely used in modern sport competition. In fact, the use of the off-hand as a defensive measure is often prohibited by the rules of many sport fighting styles that are common in the Western world today.