A certain level of muscle strength is needed to function every day and do things such as walking and climbing stairs. Strengthening exercises increase this muscle strength by putting more strain on a muscle than it is normally accustomed to receiving. This increased load stimulates the growth of proteins inside each muscle cell that allow the muscle as a whole to contract.

Now for the real solution: a 20-minute workout you can do at home. No commute to the health club, no traffic, no packing the gym bag, no waiting for the power rack to open up. Below is a great, quick workout you can do at home (or in a hotel room if you’re on the road) that focuses on the legs, chest and abs. It requires no equipment and, if done with purpose, is intense enough to give you a great pump and shock your system something fierce. Give it a try next time you’re trapped at home and have the training itch.

Bend your knees to lower down into a split squat. Your left knee should ideally form a 90-degree angle so that your thigh is parallel to the ground, and your right knee is hovering above the floor. (Quick position check: your left foot should be stepped out far enough that you can do this without letting your left knee go past your left toes—if you can't, hop your left foot out a bit farther away from the bench.)

You're adding lean muscle. If you did a strength-training routine, your muscles are now starting to rebuild themselves and repair the microscopic tears that come with lifting weights, says Paul Gordon, PhD, director of the Laboratory for Physical Activity at the University of Michigan School of Medicine in Ann Arbor. Preliminary research shows that women respond to and recover from resistance training faster than men.
Fruits and vegetables are highly nutritious and keep your metabolism active. Therefore, more fruits and vegetables should be incorporated into your diet. Eat at least two types of fruits every day. Unhealthy items like colas, alcohol, and processed foods like chips and cookies should be eliminated. Mono and polyunsaturated fats from sources like olive oil, flaxseeds, walnuts, trout, and salmon should replace the unhealthy saturated fats. Reduce the intake of flour and refined sugars and consume more of whole grains.
Endorphins are hormones in the brain associated with a happy, positive feeling. A low level of endorphins is associated with depression. During exercise, plasma levels of this substance increase. This may help to ease symptoms of depression. A recent National Health and Nutrition survey found that physically active people were half as likely to be depressed.

The skin also serves as a release point for heat. (See “Why Does My Face Turn Red When I Exercise?” for more on that.) When you exercise, your muscles generate a lot of heat, which you have to give up to the environment so your body temperature doesn’t get too high, Hackney says. The heat in the muscle transfers to the blood, which shuttles it to the skin; it can then escape into the atmosphere.

So I´m almost done with the challenge. I did get a bit delayed because some days it was just too hard to add reps, so I just repeated the same count. Still, I´m feeling the results for sure and can even hold my half-cobra properly for the Beginners calendar´s Day 1, the whole time, where I couldn´t even get into the position before. It´s awesome. Hello abs, you´re next! ;D

Commit to a 7-day meal plan. Create a 7-day meal plan that covers 3 main meals (breakfast, lunch, dinner), scheduled at the same time of day, and 2 small snacks (between breakfast and lunch, and lunch and dinner), scheduled at the same time of day. A set meal plan will ensure you eat at a consistent time every day and do not skip or miss a meal. Consuming about 1,400 calories a day, combined with exercise, can help you to achieve healthy weight loss.[11]