Know the difference Cable fly crossover single arm.The cable fly crossover single arm is an isolation exercise that targets the chest muscles, specifically the pectoralis major and minor.1️⃣ The high low cable crossover is a popular strength training exercise primarily targeting the lower chest muscles, specifically the pectoralis major.2️⃣ The bent-over cable fly crossover single arm is an effective exercise that targets the chest muscles, particularly the pectoralis major and minor.#bodybuildi