Women's Fitness: Moving Through Every Stage of Life | Best You Mom

Adolescence is one of the most important windows for lifelong bone health. Most peak bone mass is built during childhood and the teen years, and weight-bearing, high-impact activities like running, jumping, basketball, or gymnastics are especially effective at building strong bones during this stage. The CDC recommends that adolescents get at least 60 minutes of moderate-to-vigorous physical activity daily, including muscle-strengthening and bone-strengthening activity at least 3 days a week. This stage is also when many girls develop their relationship with movement and their bodies for the first time, making it a critical period to build a foundation of joyful, sustainable activity rather than a narrow focus on appearance or performance.

During the reproductive years, hormones fluctuate across the menstrual cycle in ways that can affect energy, strength, and recovery. Some women notice their performance and energy shift across different phases of their cycle, though research on exactly how much and in what direction is still developing. Strength training, cardiovascular exercise, and flexibility work all remain foundational here, and many women find it helpful to pay attention to how their body feels and performs across the month rather than expecting the same output every single day. This stage also includes pregnancy and postpartum for many women, distinct chapters with their own physical demands and considerations.

Pregnancy changes nearly every system in the body, and exercise during this time should be adapted, not abandoned, for most women with uncomplicated pregnancies. Postpartum recovery then brings its own timeline: rebuilding strength, especially through the pelvic floor and core, gradually and safely. We cover this stage in much more depth on our dedicated Pregnancy and Postpartum Recovery pillar pages.

Premenopause generally refers to the reproductive years before any signs of the menopausal transition begin, essentially, the years when cycles are still regular and hormone levels haven't yet started their transitional decline. This is a strong window to build the strength, muscle mass, and bone density that will help carry you through the more hormonally turbulent years ahead. Establishing consistent strength training habits now pays dividends later.

Perimenopause is the transition leading up to menopause, when estrogen begins to decline and fluctuate. It typically starts in your 40s, though it can begin earlier or later, and can last for several years. As estrogen drops, muscle mass and bone density both begin to decline more quickly, making strength training especially valuable during this stage. Most guidance recommends resistance training 2 to 3 times a week, along with moderate cardio and flexibility work. We go into much more depth on this in our dedicated Perimenopause & Exercise pillar.

Menopause is officially reached after 12 consecutive months without a period, on average around age 51 to 52 in the U.S. The years immediately around this milestone often bring continued bone density loss, changes in body composition, and symptoms like hot flashes and sleep disruption. Exercise, especially a combination of resistance and weight-bearing training, remains one of the most effective tools for supporting bone strength, managing weight changes, and protecting cardiovascular health through this stage.

Postmenopause is the stage of life after menopause has been reached, and it lasts for the rest of a woman's life. Bone density loss continues to be a major consideration here, research shows that a combination of high-intensity weight-bearing and progressive resistance training is particularly effective for maintaining bone strength and reducing fracture risk in postmenopausal women. Strength training also continues to combat age-related muscle loss (sarcopenia), supports balance and fall prevention, and protects long-term independence and quality of life.