Performance programming for female athletes: the menstrual cycle and loading

For many years, most sports science literature was based on male athletes. Over the past decade, physiological differences specific to female athletes have become better understood and have begun to shape programming. In this article we look at the key differences affecting performance in female athletes and what they mean in practice.

Key physiological differences

• Muscle mass and distribution: Absolute strength is generally lower; but relative to lean mass the difference shrinks significantly, and in the lower body it nearly disappears.
• Fatigue resistance: Female athletes generally perform more reps at submaximal loads and recover faster between sets. This means they can tolerate higher volume at the same percentage.
• Metabolism: The rate of fat oxidation during endurance work is relatively higher.
• Joint structure: A wider pelvic angle and general joint laxity can affect knee mechanics.
• Hormonal cycle: Fluctuations in estrogen and progesterone can affect tissue properties and recovery.

ACL risk and prevention

The rate of non-contact ACL injuries in female athletes is significantly higher than in male athletes in the same sport. The causes are multifactorial: the knee collapsing inward on landing (dynamic valgus), quadriceps-dominant muscle activation, hamstring strength deficits and hormonal effects all play a role.

The good news: neuromuscular training programs significantly reduce this risk. An effective prevention program includes:

• Landing training: Quiet landings that maintain knee-foot alignment; a progression from double-leg to single-leg.
• Eccentric hamstring strength: Nordic curls, 2 sessions per week.
• Hip abductor and external rotator strength: Lateral band walks, single-leg bridges, Copenhagen planks.
• Change-of-direction technique: Body position and foot placement during braking.
• Plyometrics: At controlled volume, with landing quality as the priority.

This program achieves the best adherence when integrated into the warm-up 2–3 times a week in 15–20 minute blocks.

The menstrual cycle and training

This topic is widely discussed, yet the evidence is still unclear. Current literature shows that the effect of cycle phases on performance is small on average, but individual differences can be large. The practical approach is to monitor rather than impose strict rules.

An actionable recommendation: the athlete records their cycle, daily readiness score and session quality for 2–3 months. If an individual pattern emerges, the program is adjusted accordingly; if not, standard planning continues. For athletes using hormonal contraception, the cycle works differently and this monitoring is evaluated separately.

RED-S: the most serious risk

Relative energy deficiency in sport (RED-S) results from intake that's insufficient relative to energy expenditure and is more frequently recognized in female athletes. Its signs are wide-ranging: irregular or missed periods, frequent injuries and stress fractures, frequent illness, performance plateaus, and sleep and mood disturbances.

Loss of periods (amenorrhea) is not “normal” in athletes; it's one of the most visible signs of energy deficiency and has long-term consequences for bone health. In this case the priority isn't training but increasing energy intake and getting an expert assessment.

Strength training: myths and facts

A common hesitation about heavy strength training for female athletes is the fear of “bulking up.” Physiologically, significant hypertrophy in female athletes requires high-volume, long-term specialized programs; the low-rep heavy sets used in athlete programming produce neural adaptation more than muscle mass. The result is a stronger, faster athlete.

Two practical differences are considered in programming: female athletes can usually perform slightly more reps at the same percentage and tolerate slightly shorter rest between sets. This makes a personal rep–percentage table even more important when adjusting volume and intensity. Our 1RM and rep percentages article covers this topic.

Iron and bone health

Iron deficiency is common in female athletes, especially in endurance sports, and is an overlooked cause of fatigue and declining performance. An annual blood panel (including ferritin) is recommended. For bone health, adequate energy intake, calcium and vitamin D are needed, along with strength and jump work in the program; loading is the most powerful stimulus for increasing bone density.

Frequently asked questions