The Most Effective Weight Training, Cardio & Nutrition for Women | Dr. Lauren Colenso-Semple

Lauren Colenso-Semple argues that men and women show very similar muscle-protein-synthesis, protein-metabolism, and growth responses to exercise and nutrition. The clearest baseline difference is muscularity established during male puberty, when testosterone rises and muscle mass increases. Once training begins, however, relative gains can be similar across sexes.

The discussion distinguishes normal hormone variation from supraphysiological exposure. Within a broad normal testosterone range, hormone levels do not reliably predict who will respond better to resistance training. Exogenous androgens at supraphysiological levels can produce muscularity that would otherwise be difficult to achieve, but that evidence does not translate into a general rule for people training without chemical enhancement.

Individual differences in muscle and strength potential remain substantial, but Colenso-Semple attributes them to different starting points, the training stimulus, consistent progressive work, and possible genetic factors rather than to a simple testosterone ranking. Adaptation can be dramatic in both sexes for endurance and resistance training.

The episode questions whether exercise should be designed to produce short-term testosterone or growth-hormone surges. Colenso-Semple explains that these acute responses were once treated as the driver of hypertrophy, which encouraged high-repetition training and supersets aimed at maximizing them. Current reasoning instead separates a temporary hormonal response from the longer-term adaptations that matter.

The conversation also addresses the longstanding fear that heavy lifting will make women unintentionally bulky. Colenso-Semple links increased acceptance of resistance training to bodybuilding’s bikini category, group fitness, and CrossFit, while noting that extreme muscularity generally requires sustained hard work and often pharmacological assistance. The practical message is that the fear of accidental extreme size is inconsistent with ordinary training outcomes.

Colenso-Semple rejects the idea that girls should avoid resistance training. She notes that adolescent athletes may gain performance and injury-reduction benefits from resistance work alongside sport-specific practice, while activities such as monkey bars and gymnastics already expose children to informal resistance. The barrier has often been cultural rather than safety-based.

Starting earlier can help build habits and accumulate muscle before age-related loss becomes a problem, but it is never too late to begin. A beginner should use a full-body program that trains the major muscle groups with a load close enough to failure to provide a growth stimulus, then progress load or repetitions over time. Two or three weekly sessions favor full-body training; higher frequencies can use upper/lower or more detailed splits.

Exercise selection can remain consistent when practicing a lift such as the squat, or vary across barbell, machine, dumbbell, posterior-chain, quadriceps, and glute-focused movements when variety or a specific goal matters. The appropriate split depends on the number and duration of exercises and on the trainee’s goals.