Performance
An exercise physiologist corrects male-default training and fueling advice, showing how female athletes should adjust for their physiology across the monthly cycle.
The author argues that the menstrual cycle sets a shifting backdrop for training. In the low-hormone phase most women feel strongest. In the high-hormone phase, raised progesterone can blunt gains from training, increase muscle breakdown and reduce carbohydrate storage, so women can plan hard efforts and fueling around the phase they are in.
The common belief that menstruation always hurts performance is, on the author's account, a myth. Low hormone levels during a period can actually help strength and endurance for many women, though individual experience varies.
The author warns that from age 30, women who don't strength train lose roughly 3–5% of their muscle each decade. Resistance work is the load that tells the body to keep muscle, so it becomes more necessary, not less, with age.
The author sets protein for athletic women well above standard advice for inactive women, around 1.8–2.2 g per kilogram of body weight a day. She also advises timing it: leucine-rich protein before exercise and within 30 minutes after helps hold onto muscle when hormone levels are high and the body tends to break muscle down.
The author recommends only a narrow set of supplements: iron, vitamin D and magnesium. She warns that popular extras such as calcium and antioxidants like vitamin C are not just unnecessary but can be harmful.
Most sports nutrition products and training plans are designed around men, so women who follow them are often working against their own bodies. The author's point is that women are not scaled-down men: their needs differ in kind, not just in size, and must be planned for on their own terms.
According to the author, hormonal contraceptives replace natural cycles with a flat pattern. They also lower heart rate variability, which can impair recovery and performance, so women lose both the cycle's ups and downs and a useful recovery signal.
Women who train hard often eat too little for the energy they spend, and this low energy availability is common rather than rare. A study the author cites found 65% of female endurance athletes at risk, with 21% showing signs of disordered eating.
A woman's physiology shifts across her life, through pregnancy and menopause, so one fixed plan cannot serve her for decades. The author treats these life stages as reasons to adjust training and fueling, not reasons to stop being active.
Standard recovery and hydration methods don't affect men and women the same way. Hormones change women's hydration needs. The author notes that ice baths can make men shiver and spasm in tired muscles, increasing soreness and stalling recovery, so recovery methods should be checked against who is using them.