When I feel bored in my fitness routine, I break up my tedious running and strength-training schedule by sprinkling in some 15-minute kickboxing YouTube videos.
The change in pace helps prevent burnout, plateauing, and overuse injuries from doing the same workout every day — plus, it's a very effective sweat, too. Since kickboxing is all about high-energy kicks, jabs, squats, and shuffles, I feel the cardio and toning effects in minutes.
With that said, you'll want to keep a water bottle and towel close as you explore the following workouts — especially if you plan on challenging yourself by adding in free weights.
Image Source: POPSUGAR Photography / Matthew Kelly