Complex sentence: There have been discrepancies between studies that prove and disprove the effects of BCAAs on muscle breakdown attenuation and delayed muscle soreness onset primarily due to inefficient methods to quantify muscle breakdown attenuation and delayed muscle soreness solely due to BCAA supplementation.
Split into simpler sentences: There have been discrepancies between studies that prove and disprove the effects of BCAAs on muscle breakdown attenuation and delayed muscle soreness onset. This is primarily due to inefficient methods to quantify muscle breakdown attenuation and delayed muscle soreness solely due to BCAA supplementation.