Lie on your left side and position yourself so that your bottom forearm is directly under your armpit and your legs are straight with feet stacked. Brace your core and lift your hips in the air, forming a straight line from ankles to shoulders. Next, raise your top leg, without bending your knee, a few inches into the air. Hold for 3-5 seconds, lower the leg, and repeat. Complete required reps then switch sides.

You're aiming to kick start muscle hypertrophy, the cellular process that spurs growth. Researchers have found that the best way to initiate that process is by performing two or three sets of an exercise for six to 12 repetitions, with about 30 to 60 seconds' rest between sets. You're damaging the muscles with the work — then the protein you've been consuming will help build them back up even bigger.


“I would really focus on learning how macros work, how your body works and how it reacts to certain foods, and what your body requires each day to maintain your weight,” he advises. “Then you can start playing around with increasing calories [to bulk up], and decreasing calories when you're dieting.” Our beginner's guide to macros will definitely help.

Prolonged sitting and activities like running or cycling can lead to tight hip flexor muscles and a variety of skeletal imbalances. Think: if you only cycle for exercise, certain muscles in your legs will get stronger (in a lot of cases you overwork these muscles) yet your core and outer hip muscles might get weaker from lack of engagement. So what? Well, these muscle imbalances often lead to skeletal imbalances and injuries down the line. If you have particularly tight hip flexors, your body will start to create an anterior pull on the pelvis (anterior pelvic tilt). You can identify an anterior pelvic tilt if your belly protrudes slightly in the front while your butt sticks out in the back (what some people refer to as “duck butt”).

For the sake of mental focus, it’s best to keep any carbs you eat low during the day when you’re working and active and get the lion’s share of them at night with dinner. A typical breakfast could include eggs, yogurt, and fruit, or a shake, and lunch could be meat or fish and steamed veggies. For dinner, have meat or fish again, along with sweet potatoes or rice, and vegetables.

Imagine not being able to climb stairs, bend over, or even walk Changes in hip joint muscle-tendon lengths with mode of locomotion. Riley, P.O., Franz, J., Dicharry, J., et al. Center for Applied Biomechanics, University of Virginia, Charlottesville, VA. Gait & Posture, 2010 Feb; 31 (2): 279-83.. All pretty essential if you ask us! But that’s what our bodies would be like without our hip flexor muscles. Never heard of ‘em? It’s about time we share why they’re so important, how your desk job might be making them weaker (ah!), and the best ways to stretch them out.
If you’ve been training longer than 6–12 months, you can split your workouts into upper- and lower-body days. The most common setup is to train upper body one day and lower the next so that each area gets trained twice in one week. If you train four days per week, you can train upper body on Monday, lower Tuesday, rest Wednesday, and then do upper body again on Thursday, lower body on Friday, and then rest on the weekend.
Let’s say your concentric is 30lbs and you don’t take my advice and keep the 30lbs for your eccentric. Let’s say, I assume you can do 50lbs on the eccentric, but choose to keep it at 30lbs. If you actually started off making light weight feel heavy, that 30lbs would of been around 10–20lbs and my assumption would of been 30lbs. My first assumption was a heavier weight. Your concentric was a heavier weight. What changed? Why did the overall weight become lighter after making light weight feel heavy?
This exercise is challenging and will certainly be beneficial even without weights. If you can execute perfect form with your body weight, you can make the exercise harder by adding weights to your hands, by stepping on an unstable surface with your front foot (balance disc, foam pad), or you can place your rear leg on an unstable surface such as a physioball. You should be able to comfortably perform 2-3 sets of 10 reps on each leg before advancing this exercise.
Español: aumentar la masa muscular, Deutsch: Muskeln aufbauen, Português: Aumentar a Musculatura, Nederlands: Spieren opbouwen, Français: se muscler le corps, Русский: нарастить мышечную массу, 中文: 增长肌肉, Čeština: Jak budovat svalovou hmotu, Bahasa Indonesia: Membangun Otot, Italiano: Sviluppare Massa Muscolare, 日本語: 筋肉をつける, हिन्दी: बॉडी बनायें (Kaise Body Banaye), العربية: بناء العضلات, 한국어: 근육을 키우는 법, Tiếng Việt: Tạo Cơ bắp, ไทย: สร้างกล้ามเนื้อ, Türkçe: Nasıl Kas Yapılır
K. Aleisha Fetters, M.S., C.S.C.S., is a Chicago-based personal and online trainer. She has a graduate degree in health and science reporting from the Medill School of Journalism at Northwestern University and regularly contributes to Men's Health, Women's Health, USNews.com, TIME, and SHAPE. When she's not lifting something heavy, she's usually guzzling coffee and writing about the health benefits of doing so. 

How to do it: Lie on your back with both feet planted firmly against the flat base of a Bosu ball, knees bent. Stabilize your body. If you’re feeling a bit wobbly, your arms can hover on either side of you in case you fall in one direction. If you feel balanced, raise your arms straight up above your chest, hands clasped to challenge and work your stability. Drive your hips toward the ceiling, then lower and repeat.  
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