Complex sentence: English riding is an equestrian discipline with many different styles, however, at the most basic level, most versions require riders to use both hands on the reins, rather than just one hand, as is seen in western riding.
Split into simpler sentences: English riding is an equestrian discipline with many different styles. However, at the most basic level, most versions require riders to use both hands on the reins, rather than just one hand, as is seen in western riding.