This means exercises such as squats, deadlifts, and virtually any exercise done standing (including things like dumbbell curls when done standing up). So the next time you do deadlifts or even dumbbell curls, really squeeze and contract your abs. Not only will doing so allow you to lift more weight, but it’ll also help you develop a strong and badass six pack.
During your weight-training workouts try to keep your rest periods to a minimum between each set. Rest periods between sets should be 30 to 60 seconds in length. With shorter rest periods between sets your heart rate will stay elevated throughout the entire workout. Again, this is just another simple strategy you can use to increase caloric expenditure and enhance fat loss!
If the basic plank is too easy, after 60 seconds, add a few arm and leg lifts to the next 60 seconds. Every 15 seconds, alternate lifting one arm out in front of you while maintaining your posture for 10 seconds and repeating on the other side, and then switch to the legs. Lift the toes 5-10 inches off the floor and hold it for 15 seconds, and repeat with the other leg.
But instead of just trying to perform as many reps as possible, slow down and really focus on the quality of the movement—especially the eccentric, or downward motion, of the exercise, he says. “The eccentric contraction is the most important phase when sculpting any muscle.” Plus, focusing on quality over quantity will help protect your back (some experts say crunches can be potentially troublesome for guys with back issues.)
After having achieved this goal, there’s a seemingly big void in my life. I intend to fill it up with another ambitious goal instead of more training, though the latter is far more tempting! I find that training, staying fit, and eating right fits in very well with my lifestyle. I intend to keep it that way while being content with slow but lean and steady gains over time. I do intend on dabbling in boxing and advanced callisthenics in the future.

Do it: With your feet shoulder-width apart, lift a barbell off the rig, centering it evenly across your shoulders. (This version of the squat targets the core, not the legs, and so you should be using far less weight than you would for a traditional back squat.) Send your glutes back like you’re lowering into a chair, bending at the knees as deeply as possible. Press through your heels to return to the starting position for one rep. Do 12 reps for one set. 

Lie face-up and place your lower legs on a Swiss ball. Extend your right arm overhead and bend your left arm at a 90-degree angle; then grasp the upper portion of your right arm so you form a cradle for your head. Flexing your toes and holding the ball in place by contracting your hamstrings, crunch forward to the finish position. In this position, increase the tension on your abs by attempting to pull the ball towards you with your hamstrings. Return to the start and exhale. Your rectus abdominus can flex only about 30 degrees (strictly), so when you perform this exercise it may not be necessary to lift your shoulders off the floor to achieve peak contraction. You can make the exercise more difficult by pulling harder with your hamstrings, maintaining peak contraction longer and by holding a weight in your free hand.
Begin in the basic plank position. Your torso will be in a straight line from head to toe and avoid any drooping or sagging of the hips or shoulders. Also, avoid arching your back, or hanging your head. Warm up by maintaining the plank for at least 60 seconds while maintaining control. If you start shaking or losing form, drop to your knees and rest a few seconds and continue until you've completed a full minute
So why so much chest, back, and arms work? Ironically, showcasing your newfound six-pack won't be just about the abs. By building up your entire upper body, you’ll create more shape that will help define the midsection. Your volume of muscle building will also increase your metabolic rate, helping you burn more calories in the process. Remember, it’s all connected. You'll thrash your abs three days a week along with some interval cardio activity for 30 minutes, and bang out some other muscle groups or hit a second helping of arms with whatever time you have left. Your other three days per week will be dedicated to chest, back, and arms exercises, so that your upper-body mass grows—increasing the V-angle and minimizing the chance of having a belly.
Muscles exert higher EMG tension when they are contracting eccentrically (lowering the resistance) versus raising it; but the problem with most exercises is that the amount of weight you can lower is limited by how much you can lift positively (concentric work). This exercise compensates for the problem by changing the leverage during the lowering (eccentric) phase of the exercise.
Lie faceup with feet flexed in the air so body creates a 90-degree angle and arms are rested palms down at sides. Use core to pulse legs straight up towards ceiling, lifting butt off floor and pushing weight into hands. Think about stamping the bottom of your shoes on the ceiling and avoid using momentum to swing legs forward and up. Lower back to floor and repeat.
My Cardio and Callisthenics circuits really helped me increase my stamina and perform like an athlete. Some of my favourite ones are Burpees, Crab Walk, Jumping Jacks, Jumping Squats, Kettle bell runs and in general, circuits variations that really push me to the limit. I followed an HIIT program on the treadmill where I would run for 2 minutes and walk for 1 for a total of 12 minutes. I used the preprogrammed interval training option on the elliptical and stepper machine. I also went to the park sometimes for my workouts. You’ll be surprised at how different and relatively harder it is to train in the open.