A fitness trend that emphasizes short, intense workouts requiring minimal equipment is High-Intensity Interval Training (HIIT). This training approach alternates between short bursts of intense activity and rest or lower-intensity periods, maximizing calorie burn in a limited time. HIIT can be tailored to various fitness levels and is versatile enough to be performed anywhere, making it accessible. The efficiency and effectiveness of HIIT workouts have made them popular among busy individuals looking to achieve fitness goals in a time-efficient manner.