Stand holding medium-weight dumbbells at your shoulders, elbows pointing forward, core engaged. Keeping your core tight and your chest up, lunge backwards with your right knee, stepping backwards then lowering that knee until it touches the ground or until your left thigh is parallel with the ground. Pause, then drive back up and repeat the process on the other leg. Alternate legs until time expires. Do 3 sets.
Your body is genetically predisposed to storing fat in certain locations in a certain order.  When you start to lose weight, your body will lose the fat you currently have in a certain order as well – it might come off your arms first, then your legs, then your belly, then your chest, and THEN your butt. Or in a different order, depending on your personal genetic makeup.
The average American flat-out loathes strength training. While about half of people do the recommended amount of aerobic activity each week, only 20% also do the muscle-strengthening moves that work major muscle groups. Yet the scientific benefits are stacking up in favor of it, from bone protection to disease prevention, and it appears to have special benefits for women.
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.
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.
Why: "The best way to maintain and improve bone density is through exercises that involve your entire lower body," says Perkins. "This move is considered a weight-bearing, compound, complex exercise, and is number one for bone health. In addition, the majority of age-related falls and bone fractures involve the pelvis. This move specifically targets and strengthens the muscles and bones of the pelvis." (Here are 4 more strength-training exercises you can do with a chair.)
However, since most women use workout routines comprised of little “girly” weights and super high reps, and are only interested in workouts that avoid big compound exercises, using lower reps, using free weights, and absolutely never attempt to make progressive overload happen or lift anything heavier today than they lifted 100 workouts ago… most women will never build any muscle.
If you’re new to strength training, simply moving and manipulating the weight of your own body can lead to some desired adaptation within your body in terms of getting stronger and adding muscle mass.  In fact, it’s vitally important to master the basics of movement and being able to comfortably handle your own body weight before you add external load (i.e., anything you can add to increase the resistance of a movement, like a band, a sandbag, a chain, a kettlebell, a dumbbell, or a barbell).
From this we see that active women would benefit from consuming 2 grams/kg of bodyweight, which is about 1 gram/lb of bodyweight. For a 150 lb woman, this means that she needs 150 grams of protein per day. Ideally your protein should be spaced out throughout the day. If you eat five meals a day, this would be 30 grams of protein per meal (continuing with the example above).
We cannot stress enough how important it is to maintain strict form on all movements. This means stabilizing your body and contracting your abs so you isolate the primary intended muscles. For example, when doing a standing barbell curl, tighten your abs and do not rock or swing the weight. By tightening your abs, you stabilize your body and prevent momentum. This will also help condition your abs and save your lower back from injury.

Though cardio burns more calories than strength training during those 30 sweaty minutes, pumping iron slashes more overall. A study in The Journal of Strength and Conditioning Research found that women who completed an hour-long strength-training workout burned an average of 100 more calories in the 24 hours afterward than they did when they hadn't lifted weights. At three sessions a week, that's 15,600 calories a year, or about four and a half pounds of fat—without having to move a muscle.
Element 5 Day Yoga offers five 15-minute sequences to pick and choose from based on your mood and motivation. "It's an easy way to get to the mat every day," one tester said, whether your body needs a Stretch & Restore session or more of an invigorating Energy & Flexibility set. Plus "the instructor provided just enough guidance, no unnecessary chatter." Namaste to that.
"I had my first baby at 35 and my third at 39, so the struggle to get back in shape was real. Before I was married with kids I enjoyed going to the gym, but afterward I needed to find something that helped me be more consistent. That's when I found the P90X series, a workout DVD series featuring a bunch of different exercises targeting different muscles. For example, there's an abs workout, as well as one for legs and back, shoulders and arms, yoga, cardio, and stretching.
You need to eat real foods. And you need to eat enough of it.  Honestly, unless you’re incredibly small, I would never recommend ever putting any woman on a diet of 1200 calories. In fact, I don’t recommend women ever dip below 1800 calories per day if they are exercising regularly!  I understand that every woman is different, and every woman processes calories differently, but I can’t emphasize enough that quality of food is so dang important!