“Hybrid training incorporates strength and endurance, merging them to improve overall strength and cardiovascular fitness,” says Reece Williams, a physical therapist at UNTIL. A study published in the journal Circulation studied the impact different training modalities had on cardio fitness by reviewing data from 4331 individuals, finding hybrid training was better than HIIT, steady state jogging, and pure weight training for a healthy heart and lungs. A study in the British Journal of Sports Medicine, asked whether pro athletes could train smarter and harder to avoid injury, concluding that mixing-up your workout protocols over time led to better greater strength, decreased chance of injury, and greater all-round fitness.