Complex sentence: Most researchers and practitioners focus on sport and/or exercise activities, the principles and theories may be applied to any human movement or performance tasks (i.e., playing a musical instrument, acting in a play, public speaking, motor skills).
Split into simpler sentences: Most researchers and practitioners focus on sport and/or exercise activities. The principles and theories may be applied to any human movement or performance tasks (i.e., playing a musical instrument, acting in a play, public speaking, motor skills).