Ready, reset, go! Our Flat-Belly Challenge pairs belly-blasting workouts with fat-burning recipes to help you slim your middle and strengthen your core. Day 15 consists of a 30-minute interval workout followed by a refreshing papaya ginger mint smoothie.

Image Source: POPSUGAR Photography / Kat Borchart

Treadmill Interval Workout

For a quick workout that torches calories, tackle today's 30-minute treadmill interval workout. This boredom-busting workout will burn belly fat and leave you feeling energized for the week ahead. Click here for an image-free printable version of this workout.

Time Speed
(mph)
Incline Notes
0:00-5:00 4.0 2.5 Warmup
5:00-6:00 5.0 1.0
6:00-7:00 6.0 1.0
7:00-8:00 5.0 1.0
8:00-9:00 6.5 1.0
9:00-10:00 4.0 1.0
10:00-11:00 6.5 1.0
11:00-12:00 5.0 1.0
12:00-13:00 7.0 1.0
13:00-14:00 5.0 1.0
14:00-15:00 7.5 1.0
15:00-16:00 4.0 1.0
16:00-17:00 6.5 1.0
17:00-18:00 5.5 1.0
18:00-19:00 7.0 1.0
19:00-20:00 5.5 1.0
20:00-21:00 8.0 1.0
21:00-22:00 5.0 1.0
22:00-23:00 7.0 1.0
23:00-24:00 5.5 1.0
24:00-25:00 6.5 1.0
25:00-30:00 4.0 2.0 Cooldown

Papaya, Ginger, and Mint Smoothie

Image Source: POPSUGAR Photography / Leta Shy

Feeling wiped after a weekend full of rich and delicious meals? If you've been feeling tired and in need of a body boost, prepare this delicious and debloating papaya ginger mint smoothie. With stomach-calming ginger and mint, plus the probiotics in Greek yogurt, it will help relieve digestion and flush out toxins, leaving you feeling refreshed. If you've enjoyed an indulgent weekend, this smoothie is a perfect way to wind down.