Kneel on a mat on all fours with your hands directly under your shoulders. Stretch your legs back one at a time to come into plank position (the “up” part of a push-up); engage your ab muscles. Your body should be long and straight; don’t let your hips sag or lift your butt too high. Imagine there’s a seat belt tightening around your waist, drawing your lower-ab muscles inward.
To do it: Start in a plank position with one small towel placed under each ball of your foot, legs together. Bring your left knee in towards the right side of your chest, squeezing your abs. Then, straighten your right leg back out to full plank and bring your right knee in towards the left side of the your chest and back out to full plank. Next, draw both knees into your chest at the same time and then slide your legs back out to full plank. That’s one rep. Build up to 3 sets of 12-15 reps (resting in between).
BMI vs Body Fat Percentage- Body Mass Index or BMI calculates your ideal weight in relation to your height. This isn’t a great way of determining whether someone is healthy because it completely ignores how much muscle an individual holds. A better alternative is determining your Body Fat Percentage -BFP and then take a cue from your BMI as to how healthy you are. Here’s a visual comparison of how different body fat percentages look like. You can get your BFP measured by a Bio-electrical Impedance Scale found at gyms or at a nutritionist’s clinic.

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.
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.
“You will not make more muscle by trying this route,” says McComsey. When you do cardio you’re burning calories, but you’re not stimulating your muscles to grow as you would with weight training. “The more muscle you have, the more calories and fat you’ll be burning,” he says. McComsey recommends hitting the weight room three or four days per week, with one of those days being a circuit with a variety of exercises. If you need to do cardio, try one day of 20-minutes of fast-slow intervals.
To do it: Lie on your back with your hands interlaced behind head, knees bent ,and feet hip-width apart on the floor. Inhale and lift your chest towards your knees, bringing your shoulders and head off the floor, maintaining a neutral pelvis (keeping it parallel to the floor). Exhale and rotate to the right side, and then exhale again rotating even further, lifting a little higher. Next, inhale and lift as you return to the center and repeat to the other side. Do 8-10 reps per side.
Trainer tip: You know planks, right? It’s easy to go through the motions here. Don’t do it. “The key is to squeeze your entire body—quads, glutes, core, back, and fists—as tight as possible while taking diaphoretic breathes throughout the hold,” says Wealth. No matter how many times you’ve done it, this exercise is as difficult as you’re willing to make it.
If it was possible for the experienced bodybuilders to build muscle without gaining fat or, better, build muscle and lose fat at the same time then they would do it in a heartbeat. Who wants to go through the ordeal of bulking and cutting when it’s possible to build muscle and burn fat at the same time? The answer is hidden in the muscle growth rate. Muscle growth follows a logarithmic pattern (rather than a linear pattern), which means that muscular gains come quickly in the beginning but they decrease over time.
Bodyweight exercises always recruit more than one muscle group for each exercise so it is impossible to isolate and work one muscle group specifically by doing one type of exercise. It is however possible to increase the load targeting specific muscle groups with specific exercises so that they respond the most to the challenge. The following chart helps you find the exercise that helps focus more on specific abdominal muscle groups for best results. 
"This exercise is so effective because it teaches you not to rely on your bigger muscle groups (like your thighs) and focuses on using your abdominals correctly in a controlled manner without using momentum. The use of the ball gives you natural feedback of your weaker side so that you can adjust and work on symmetry of your musculature, preventing future injuries."

Yuri Elkaim is one of the world’s most trusted health and fitness experts. A former pro soccer player turned NYT bestselling author of The All-Day Energy Diet and The All-Day Fat Burning Diet, his clear, science-backed advice has transformed the lives of more than 500,000 men and women and he’s on a mission to help 100 million people by 2040. Read his inspiring story, “From Soccer to Bed to No Hair on My Head” that started it all.


To do it: Stand with your feet planted 3-4 feet apart, toes slightly turned out, hands on your hips. Lower into a plie by bending your knees out over your toes and lowering your hips directly underneath your shoulders. Then, as your straighten back up, slowly lift the right knee up towards the right shoulder. As you go back into the plie, slowly return the foot to the floor. Be sure to move at a very controlled pace to really engage the obliques the entire time—on the way up and on the way down. Do 10 repetitions on the right side, then another 10 repetitions on the left side for a total of 20.

best ways to build core

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