I appreciate such a thorough synthesis on this topic. As a systematic reviewer, my main concern would be a lack of systematic assessment of risk of bias in the individual studies. I see you did a funnel plot to see any bias by study size, but there are so many other things involved in study quality (study design, selection of participants, statistical adjustment for potential con founders, etc). I would be interested to see how many of these studies were fair or better quality (there are several well accepted quality rating tools available for various study designs). I would also be interested to see a sensitivity analysis to see if the pooled results differ when high risk of bias studies are eliminated, for example. Thanks for an interesting read.
Now that the holidays are creeping around the corner, you may have to break up with your regularly scheduled sweat sessions, at least temporarily. And though the most wonderful time of the year may interfere with your fave spin class or butt-kicking bootcamp routine, it’s completely possible to stay fit—all you need is an Internet connection and a little living room space. (OK, and maybe a few props here and there.) And it’s all thanks to these seriously excellent, totally free workout videos. We’ve rounded up the best YouTube workouts—we’re talking everything from traditional aerobics to ballet to high-intensity interval training routines—so you can keep your physique in tip-top shape this season and beyond.
Cayenne peppers have been used for centuries as a folk medicine for stimulating circulation, aiding digestion and relieving pain (topically). Cayenne increases thermogenesis by dilating blood vessels and increasing blood circulation. Blood flow to adipose tissue is very important for the transportation of fatty acids to be burned. Increasing blood flow allows more fatty acids to be delivered to tissues where they can be burned. In order to lose body fat you must burn fat!
Get on all fours with feet and knees hip-width apart. Place hands shoulder-width apart and spread fingers wide. Pressing firmly through hands, lift knees off mat and straighten legs. Walk hands forward and feet backwards to adjust position. (If you have tight hamstrings, bend knees gently.) Squeeze thighs and imagine pressing them against a flat plane. Press heels down onto mat as much as possible [shown]. Keep neck relaxed and breathe deeply.
Natalie Jill is a very popular fitness trainer who you will see guest starring on some of the other sites and channels found in this list. Her best home exercise videos can be found on her personal fitness blog which shares workouts for weight loss, exercise ball routines, jump rope workouts, booty belt workouts, body weight exercises and more. Natalie also shares great healthy recipes and useful nutrition tips on her site.
Johanna, I agree with you on the general importance of checking SRs and MAs for these points. But have you thought how these biases would represent themselves specifically *in this very topic*? You sound as if this was an SR on a drug or surgical procedure with a clear risk and direction and means of accomplishing a biased result . Greg subtlely pointed out that this topic is a lot different.
What is the most common thing you see women do in the gym? Cardio. And if they do lift weights the pick up a 5 pound dumbbell and do endless reps. As we have discussed, women need to lift heavy, challenging weights just like men in order to gain muscle. While machines do provide sufficient stimulation to gain muscle, nothing can beat free-weight/compound exercises.
When we obsess solely on our physique, we end up miserable and we never get the body we want because that perfect body doesn’t exist. When you focus on wellbeing, though, you become proud of how far your body has come and happy with how great you feel. Focusing on what you can accomplish rather than what you look like is how you become the best version of yourself.
Everybody requires a minimum number of calories to, well, live. This minimum number is called the basal metabolic rate (BMR) and can be influenced by the amount of lean muscle mass a person has. The overall number of calories your body uses on a daily basis is the sum of your BMR and additional calories you use walking, standing, sleeping, exercising, driving, and even laughing. Altogether they comprise the total energy expenditure (TEE), or your daily caloric needs.
I enjoy these workouts. They're straightforward and good for beginners, not too complex or exhausting. My only complaint is that the 10 minute lower body workout is done without holding weights. After she says bigger muscles should use heavier weights, she doesn't show any weights with the legs, which are pretty big muscles. Bodyweight is fine, but this isn't advertised as a bodyweight workout. I think a beginner video should show basic squats and lunges with weights. Other than that, it's great.
Don’t worry about what everyone else is wearing around you – this isn’t a fashion show. For shoes, look for a minimalist shoe with a hard, non-compressible sole.  Chuck Taylors are my personal favorite, but Steve wears Vibrams or Merrills. While there are some great shoe options specifically for weight lifting, as a beginner, the above multipurpose shoe will serve you just fine!
How her body has reacted: Once I started lifting, I got a lot of feedback from friends saying I’d lost weight. Funny thing is, I didn’t really lose any pounds, I was just looking leaner and fitter. Now that I’ve been lifting regularly for several years, my energy is better and I feel stronger. I’m positive that my physical fitness helped me have a faster and (somewhat) easier delivery of my son in 2016. I continued to lift responsibly through my pregnancy, which helped me quickly get back into pre-pregnancy shape later. Overall, I feel better and look better thanks to this lifestyle change.

This is important. Lifting weights on stiff or “cold” joints and muscles will make it harder to move, and you’ll increase the risk of injury. If you’re weight training, warm your body up either with some cardiovascular activity that utilizes the muscles you’re going to work, or do a short set with a lighter amount of weight than you’re planning to use for your workout.
Of course, to Perkins—who is on a mission to get women weight lifting—the benefits go even deeper. "Something magical happens when you reach for a heavy object and are surprised by your own strength," she says. "It's an incredible feeling to climb a flight of stairs and feel powerful, or when you find that you no longer need the help of a man to move boxes. It's time for women to find their power."
Stand with your feet about shoulder-width apart, holding a light-to-medium-weight dumbbell at your right shoulder, core braced and chest up. Keeping your chest up, bend at the knees and push your hips back, lowering into a squat; squat down as low as is comfortable or until your thighs are parallel with the ground, whichever comes first. Work to keep your shoulders square and balanced as you do this. Pause for a moment, then stand back up. As you stand, straighten your right arm upwards, pressing the dumbbell overhead. That’s 1 rep. Repeat reps until time’s up. Do 2 sets per arm.
How to do it: "Every woman should do a full-body strength-training routine—such as this one—two days a week," says Perkins. "Then, on top of that, you may add the other components of fitness like yoga, dance, walking, or swimming." (Add one of these 3 new walking workouts that blast fat to your exercise routine.) You can complete all of these moves in one workout, or you can split them up if you're short on time. The key is consistency. Aim to complete 3 sets for each move, and choose a weight that makes it challenging to complete the final rep of each set.
Tbh, I think bias assessment is a bit different here vs. topics where the hypothesis is that there are differences between two things (you generally wouldn’t state a hypothesis in a meta-analysis, but there’s generally one there implicitly). The primary bias in research is publication bias – you slice and dice data to get significant findings, and significant findings are way more likely to get published than non-significant findings. So, if there’s high risk of bias and significant differences, you should probably assume the actual mean effect is smaller than the one you came up with.
I wish I’d found this 15 or so years ago when I was a dance student! Back then I had a “dancer’s physique” because I spent 3-4 hours in the studio daily either in dance technqique classes, barre/floor barre exercises or Pilates based body conditioning classes and I ate a vegan diet. However, I was also tired from over-training and plagued with repetitive strain injuries (not helped by my low protein, low fat diet).
While seasoned lifters may choose to do different exercises every day during a week-long period (and repeat the same moves the following week), there's no need to follow this type of program when you're just getting comfortable, says Davis. "Stick to the same basic moves two to three times a week to build a basic level of fitness and strength," says Davis. "Why complicate things if you don’t have to? Great results can be made by repeating the same workout but increasing weights as you become stronger." Switching things up can help you avoid a training plateau, explains Davis, but so can increasing weights while doing the same exercises.

What she does now: My routine now consists of higher-intensity weight training, no more than 12 reps. I split it up into upper body and lower body, and use the maximum amount of weight I can lift. I do exercises that have big, compound movements and involve the biggest muscles — like your quads, hamstrings and glutes. My cardio I do at a higher intensity and not longer than 25 minutes, and only on the days I do my upper body. After squats and dead lifts, I can barely walk out of the gym, so no cardio.
Start standing, holding light-to-medium-weight dumbbells at your shoulders, chest up, core braced. Step your right foot back, then bend at both knees, lowering your torso until your left thigh is parallel to the ground. Press back up to standing, then press the dumbbells straight overhead. Lower them back to your shoulders and do a lunge rep with your left leg. Alternate legs on every rep until time’s up. Do 3 sets.
If you are a woman and want to gain muscle and improve your shape and curves, then you are going to have to lift heavy weights. This means that instead doing endless reps with light weights, as the media often prescribes women to do, you need to lift some heavy weights and really challenge yourself! While performing high rep sets (15-20 reps) does have some benefit, it is not optimal to adding muscle mass.
Remember Billy Blanks, the guy behind the Tae Bo craze? Now his son, Billy Blanks, Jr. is getting in on the family business. Along with his wife, Sharon Catherine Blanks, Billy Jr. will help you learn various types of dance styles in this fun workout DVD. The duo takes you through six 5-minute cardio routines that are inspired by dance styles from all over the world: hip-hop, Bollywood, African, disco, and country. It's designed for the whole family, so the kids can join in too!
Now that the holidays are creeping around the corner, you may have to break up with your regularly scheduled sweat sessions, at least temporarily. And though the most wonderful time of the year may interfere with your fave spin class or butt-kicking bootcamp routine, it’s completely possible to stay fit—all you need is an Internet connection and a little living room space. (OK, and maybe a few props here and there.) And it’s all thanks to these seriously excellent, totally free workout videos. We’ve rounded up the best YouTube workouts—we’re talking everything from traditional aerobics to ballet to high-intensity interval training routines—so you can keep your physique in tip-top shape this season and beyond.
Start in downward dog position (hips high, bending at the waist, trying to keep your arms and torso in the same line), then lift your right leg off the ground and shift your right knee so it’s beside your right wrist. Your right shin should face forward. Keeping your left leg straight, slowly lower your hips toward the floor as far as you can; this flexibility will be different for every person and different on both sides of your body. This is the start position. Now lower your chest toward the ground as far as is comfortable. Lift your right arm off the ground and thread it past your left armpit, then reach it toward the ceiling. Repeatedly thread it past your left armpit and reach it toward the ceiling until time’s up, then repeat the process on the other side.
Let’s not forget how resistance training speeds up your metabolism. With every pound of muscle you build, you will burn an additional 35-50 calories a day, even at a resting rate, and that adds up: if you gain 4.5 lbs of muscle, that’s an extra 150 calories burned a day, which is 4,500 extra calories burned each month, and THAT adds up to losing about 15 lbs a year. HELLO!
What's more, increasing that afterburn is as easy as upping the weight on your bar. In a study in the journal Medicine & Science in Sports & Exercise, women burned nearly twice as many calories in the two hours after their workout when they lifted 85 percent of their max load for eight reps than when they did more reps (15) at a lower weight (45 percent of their max).
I enjoy these workouts. They're straightforward and good for beginners, not too complex or exhausting. My only complaint is that the 10 minute lower body workout is done without holding weights. After she says bigger muscles should use heavier weights, she doesn't show any weights with the legs, which are pretty big muscles. Bodyweight is fine, but this isn't advertised as a bodyweight workout. I think a beginner video should show basic squats and lunges with weights. Other than that, it's great.
I enjoy these workouts. They're straightforward and good for beginners, not too complex or exhausting. My only complaint is that the 10 minute lower body workout is done without holding weights. After she says bigger muscles should use heavier weights, she doesn't show any weights with the legs, which are pretty big muscles. Bodyweight is fine, but this isn't advertised as a bodyweight workout. I think a beginner video should show basic squats and lunges with weights. Other than that, it's great.
Why: "The muscles of your upper arms are very small from a volume perspective. Due to the muscle loss that has occurred since your 30s (sarcopenia), these muscles are atrophied," says Perkins. "It's critical to keep your biceps muscles strong so that you are able to carry objects safely and easily. It'll also make your arms look great." (For more moves for sculpted arms, try this at-home workout.)

As for yoga, it is a wonderful form of exercise. But it is not the best way to change your body. I practice yoga for the relaxation benefits of it and the breath control. Everyone in my yoga class asks me how to get cuts in their arms. Yoga is an excellent complement to strength training but it does not change your body the way strength training does.
What she does now: I signed up with a personal trainer to help me learn more about weightlifting and strength training. Sometimes I think people don’t realize the value of having someone holding you accountable and helping you with form, education and motivation. I was determined enough to make the change that I went and purchased several months’ worth of sessions and committed to it. Little did I know that I would fall in love with how lifting made me feel.
Fitness can be intimidating. Even small, mom-and-pop gyms are usually full of weird-looking machines, equipment you don't know how to use, and unapproachable sexy people lugging around milk cartons full of pink water. Most of us new to the world of weights will walk into a gym feeling immediately overwhelmed. There's so much going on it's difficult to even know where to begin!
What's more, increasing that afterburn is as easy as upping the weight on your bar. In a study in the journal Medicine & Science in Sports & Exercise, women burned nearly twice as many calories in the two hours after their workout when they lifted 85 percent of their max load for eight reps than when they did more reps (15) at a lower weight (45 percent of their max).
So, for example, with the moves above you'd do 15 squats followed by 15 push-ups. Take a little breather then repeat that two more times. Then you move on to your walking lunges and lat pull-downs (and repeat those three times total, too). You can really do anywhere from eight reps to 15 (and even just two sets, if you don't have time for three), but "it’s not a bad idea for beginners to start with a 15-rep range to get comfortable with the exercises," says Davis. And while there's some debate over whether three sets of an exercise is really best, "it’s a great beginner model," says Davis. Don't overcomplicate things when you're just getting started.
I was fixated on this path, focusing mostly on HIIT workouts, until Instagram started showing me a different kind of inspiration: More and more girls I follow were getting into weightlifting. It is crazy how the strangers you decide to follow on social media have such an impact on your life. Suddenly, the “Strong is the new skinny” mantra that women were spreading started to really speak to me. Shifting the goal from having a thigh gap to being able to challenge your body in new ways just made so much more sense. I also began to realize that my strategy for eating “clean” was just actually putting my body and mind in a dangerous place. 
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