Athletic Body in 30 days

The 30-day challenge is totally customizable, too, making it great for all fitness levels. If you've already got a solid workout routine going, lean into the dumbbell workouts and focus on increasing your weight throughout the 30 days.

The key is to be consistent with your practice—that's the only "secret."

You'll notice you can do more reps within each timeframe, which means your fitness level is increasing. You'll also likely see some muscle definition and increased energy levels, while giving yourself a solid exercise foundation as you lean into 2021.