Trying to trim down and lean up your mid-section? All you’ll need is about 7 minutes and a timer (you can easily download an app for this). You’ll be doing each exercise movement for 45 seconds, with 15 seconds of rest in between. For example, 45 seconds of Russian twists, 15 seconds of rest, 45 seconds of leg flutters, 15 seconds of rest, and so on. Rest for 1 minute, and then repeat the entire cycle.
Make sure you lean back far enough so that you engage your core (you should feel tension in your mid-section). To up the ante, use a dumbbell or kettlebell — alternatively, fill up a bottle of water and use it instead.
Make sure you keep your back flat against the ground, as this is what ensures your core is engaged and really getting a workout. Throughout the 45 seconds, do your best to not let your feet touch the ground — hover as close to the ground as possible to really feel the burn!
Twisted Mountain Climbers
What we love about this is how it works your obliques and shoulders!