Complex sentence: Some events, such as field hockey and equestrian sports, were hard hit, while others such as boxing, judo, rowing, swimming, track and field and weightlifting had more participants than in 1976.
Split into simpler sentences: Some events, such as field hockey and equestrian sports, were hard hit. Others such as boxing, judo, rowing, swimming, track and field and weightlifting had more participants than in 1976.