Do you need to sync your strength training with your menstrual cycle?
“Cycle syncing” has become popular on social media, with advice to lift heavier during the first half of your menstrual cycle and reduce training intensity during the second half. The proposed benefit is that matching your training to hormonal fluctuations will improve strength and muscle growth. However, current evidence does not justify this as a routine recommendation.
Research by Dr Lauren Colenso-Semple and colleagues found no difference in muscle protein synthesis or breakdown in response to resistance exercise between the follicular and luteal phases studied. In her commentary, Menstrual cycles and macrocycles: Science, not socials, is doing the heavy lifting, Clare Minahan explains how these findings challenge the assumption that one phase provides a better hormonal environment for muscle adaptation than another.
These findings do not answer every question about long-term strength and muscle growth. They do, however, challenge the need for a training programme that automatically changes according to menstrual phase.
Your symptoms still matter
Menstrual symptoms can affect how you feel, your recovery and your ability to exercise. Cramps, fatigue, disrupted sleep and changes in mood may make some sessions more difficult. Adjusting your training in response to these experiences is different from following a predetermined cycle-syncing schedule.
If you feel strong and well recovered, you can continue with your planned session. If symptoms are affecting you, you might adjust the weight, number of sets, exercise selection or session length. Tracking symptoms over time may help you recognise your own patterns, rather than assuming your experience will match a standard menstrual calendar.
An individual approach to strength training
The practical focus is on consistent, progressive training that suits your goals, capacity and recovery. Physiotherapy can help you develop a programme that accommodates symptoms while building strength and confidence. Symptoms that repeatedly disrupt exercise or daily life also deserve assessment and support.
Your menstrual cycle can inform your training—it does not need to dictate it.
Reference: Minahan, C. Menstrual cycles and macrocycles: Science, not socials, is doing the heavy lifting. The Journal of Physiology. https://doi.org/10.1113/
