An estimated 80% of Americans said they took part in sports or fitness activities over the past year, marking a record high, according to a 2025 report. From TikTok-driven routines to throwback military-style training and tech-powered workouts, this year’s fitness trends promised visible results with fairly simple steps. Experts, however, caution that not every trend delivers the same benefits. Below is a look at five fitness trends from 2025 that captured widespread attention online.5 Fitness Trends That Went Viral in 202512-3-30 Treadmill TrendThe 12-3-30 treadmill workout became a social media favorite for its straightforward format: walking at a 12% incline, 3 miles per hour, for 30 minutes. Popularized by influencer Lauren Giraldo, it is often promoted as a weight-loss friendly, low-impact cardio option. The incline helps activate the glutes and hamstrings more than walking on a flat surface, while still feeling manageable for beginners. Fitness experts note that results depend on regular practice, maintaining good posture, avoiding the handrails, and easing into the routine to prevent strain.Brazilian Jiu-JitsuWith public figures like Ivanka Trump and Gisele Bündchen sharing their involvement, Brazilian Jiu-Jitsu has seen renewed interest as both exercise and self-defense training. BJJ is a grappling-based martial art that focuses on ground techniques, balance, and leverage, allowing smaller individuals to control stronger opponents. Beyond physical conditioning, it encourages strategic thinking and mental focus, which has helped build loyal communities around the sport.According to Fox News, Ivanka Trump and her family train with the Valente brothers in Miami, Florida. The instructors describe jiu-jitsu as a discipline that supports physical, mental, and emotional growth, guided by their “7-5-3 code,” which emphasizes spiritual, mental, and physical well-being.3-2-8 Fitness MethodThe 3-2-8 method gained traction as a weekly fitness framework rather than a single workout. Created by instructor Natalie Rose, it includes three days of strength training, two days of Pilates or barre, and a daily goal of 8,000 steps. The approach is designed to support muscle tone, metabolism, and hormonal health, and has been especially popular among women seeking balance rather than burnout. By combining resistance work, low-impact core training, and consistent movement, the method aims to support fat loss and overall fitness without overwhelming the body.TikTok’s 50-Jump Wake-Up RitualOne of the simplest trends to take off in 2025 involved starting the day with 50 jumps right after getting out of bed. According to Fox News, the trend’s creator, Kathryn Smith, openly shared that discipline does not come naturally to her. “I am a lazy person by nature. I always have been. I'm never gonna do something that I don't want to do,” she said in her TikTok video. Despite its simplicity, the habit struck a chord with viewers, highlighting how short bursts of movement can help boost alertness and set the tone for the day.Horseback FitnessAnimal-assisted workouts continued to grow in popularity in 2025, building on trends like Doga and goat yoga that blend exercise with time spent around animals. Among these, horseback fitness stood out. Horse riding, along with tasks like grooming and stable work, offers a full-body workout that improves balance, core strength, coordination, and cardiovascular health. Many programs also include off-horse exercises, such as Swiss ball movements, to mirror riding posture and engage the thighs and core. Beyond physical benefits, participants often point to the mental and therapeutic effects of working closely with horses.