Muscle hypertrophy — the increase in size of muscle fibres — is the goal of many athletes. Yet many people train hard without really understanding the mechanisms that make the muscle grow. Here's a structured approach, grounded in current evidence.

The three pillars of hypertrophy

Mechanical tension is the primary stimulus. Lifting a heavy enough load creates tension in the muscle tissue that triggers the biochemical cascades driving protein synthesis. Heavy loads (70-85% of 1RM) for 6 to 12 reps remain the sweet spot for hypertrophy.

Metabolic stress is produced by longer sets (15+ reps) with short rest periods. The accumulation of metabolites (lactate, H+ ions) sends anabolic signals to the muscle. Techniques like drop sets and supersets exploit this.

Muscle damage (micro-tears) triggers a local inflammatory response that — when well managed — supports regeneration and strengthening of the tissue. This is what explains soreness, though soreness is not required for progress.

Optimal volume and frequency

Current research suggests 10 to 20 sets per muscle group per week is the optimal range for most intermediate lifters. For beginners, 6 to 10 sets are enough.

On frequency, stimulating each muscle group twice a week appears superior to once a week for hypertrophy. A classic "push/pull/legs" on a 6-day split or an "upper/lower" on 4 days meets this criterion.

Progressive overload

The single most important principle in strength training is progressive overload: gradually increasing load, volume or intensity to keep progressing. The muscle adapts quickly — if you always do the same thing, you plateau.

Increase load by 2-5% once you can complete all your reps with good form. Keep a training log — it's the simplest and most effective tool to keep moving forward.

Recovery is part of the work

Muscle doesn't grow during training — it grows during recovery. Sleep is the key moment for protein synthesis. 7 to 9 hours a night is non-negotiable for anyone serious about building muscle.

Osteopathy has a real role to play here: chronic muscle tension, joint restrictions or poorly integrated scars can limit range of motion and therefore training quality. Regular osteopathic follow-up helps keep the body available for effort.

My personalised approach

Every body is different. Morphology, starting level, goals and lifestyle all influence the ideal programme. As a sports coach I build programmes tailored to these parameters — combined with osteopathic follow-up to prevent injury and optimise recovery.

If you'd like to start or refine a strength programme, feel free to get in touch.