Overtraining – Why More Isn’t Always Better

In the health and fitness world, consistency is one of the most important ingredients for progress. Regular Pilates, strength training, walking and movement all provide enormous benefits for both physical and mental wellbeing. However, there is a point where training load can outweigh the body’s ability to recover. When this happens, we move into what is commonly known as overtraining. As a physiotherapist, I often see people who are highly motivated and committed to their exercise routine, doing many positive things for their health, but unknowingly pushing beyond what their tissues can currently tolerate. The result is often persistent soreness, fatigue, reduced performance, plateaued progress, or injury.

Overtraining occurs when the stress placed on the body through exercise exceeds the body’s ability to repair, adapt and become stronger. Exercise itself is a controlled stressor, and when paired with adequate recovery, the body responds positively by building strength, endurance, mobility and resilience. However, when intensity, frequency or training volume increases too quickly, or when sleep, nutrition and stress management are lacking, the body can struggle to keep up with the demands being placed upon it.

This can happen when someone performs too many high-intensity sessions in a week, increases weights or class frequency too rapidly, returns to exercise too aggressively after time off, trains through fatigue, sleeps poorly, is under-fuelled nutritionally, remains dehydrated, or ignores the early warning signs that the body is not recovering well.

From a clinical perspective, every training session creates a degree of stress within muscles, tendons and connective tissue. This is normal and necessary, as it stimulates the body to adapt. The issue arises when tissues are repeatedly loaded before they have had sufficient time to repair. In muscle tissue, microscopic fibre damage can begin to accumulate faster than the body can rebuild it, inflammation may remain elevated for longer, glycogen stores can become depleted which often creates that heavy or flat feeling in the legs, and neuromuscular fatigue can develop, reducing coordination, balance and muscular control. Many people describe this as feeling stiff all the time, constantly tight, or like their body is never fully fresh.

Tendons are particularly sensitive to poor load management because they generally adapt more slowly than muscles. When the load placed through a tendon exceeds its current capacity, the tendon can become irritated and painful, collagen fibres may become less organised, morning stiffness may develop, and pain may warm up during exercise only to worsen later that day or the next morning. This commonly occurs in the Achilles tendon, patellar tendon, gluteal tendons around the hip, or the rotator cuff tendons of the shoulder.

Overtraining also affects the nervous system and hormonal system. Many people notice that despite feeling physically tired, they struggle to switch off at night, their sleep quality declines, resting heart rate may increase, motivation drops, concentration becomes more difficult, and workouts that were once manageable suddenly feel much harder. This is often a sign the body is stuck in a heightened stress state and requires more recovery input.

Recent research continues to support the importance of balancing training load with adequate recovery. A 2025 review by Fiala et al. published in Sports Medicine and Health Science reported that overtraining syndrome can develop when repeated physical stress is not matched by sufficient recovery. Contributing factors identified included glycogen depletion, nervous system dysregulation, inflammation, oxidative stress and sleep disruption. The authors reinforced that recovery strategies such as rest, nutrition, sleep quality and appropriate training load management are essential for maintaining performance and reducing injury risk.

Common signs that you may need more recovery include ongoing soreness lasting several days, reduced strength or endurance, heavy legs, sluggish movement, increased stiffness, recurring niggles, disrupted sleep, irritability, poor motivation to train, or sessions feeling harder than usual. These signs do not necessarily mean you need to stop moving altogether, but they do often mean the body needs smarter load management.

Recovery is where the real benefits of training occur. One of the most important pillars is sleep, as this is when tissue repair, hormonal regulation and nervous system recovery are at their highest. Aim for consistent sleep patterns, a cool dark room, and quality sleep duration where possible. Hydration is equally important, as muscles, fascia and connective tissues function best when adequately hydrated, while nutrition provides the building blocks required for repair. Adequate protein supports tissue healing, carbohydrates replenish energy stores, healthy fats support hormone function, and a balanced intake of micronutrients helps overall recovery processes.

Gentle movement can also be one of the most effective recovery strategies. A light walk, a low impact Pilates session, mobility work, swimming or gentle cycling can improve circulation, reduce stiffness and help the body recover without adding excessive load. Sunshine and fresh air are also valuable, as natural light supports circadian rhythm, mood and sleep quality, all of which influence recovery.

Where available, sauna use can also be an excellent addition to a recovery routine. Heat exposure may assist circulation, relaxation, temporary reduction in muscle tension and stress management. It can also provide a dedicated space to slow down and unwind after a demanding training week.

Hands-on treatment can also play a role when used appropriately. Massage, physiotherapy treatment, dry needling and acupuncture may help reduce muscular tension, improve mobility, calm irritated tissues and support the body through periods of overload. These approaches are generally most effective when combined with sensible training modification rather than being relied upon as the only solution.

Finally, one of the smartest ways to avoid overtraining is to plan training appropriately. This includes alternating harder and easier days, progressing gradually rather than suddenly, scheduling lower load weeks, especially for females this can be very beneficial during menstruation periods, and respecting rest days when the body needs them. More training is not always better training.

Pilates can be particularly valuable during both training and recovery phases because it allows people to continue moving while improving strength, control, mobility, breathing mechanics and body awareness, often without the same joint stress associated with higher impact exercise.

Training should build you up, not constantly wear you down. Progress happens when challenge is balanced with recovery. If you feel persistently sore, fatigued, tight or stuck in a plateau, it may not be a sign to push harder, but instead a sign to recover better. If you are unsure how much load your body can currently tolerate, or you are dealing with recurring niggles, consulting with a physiotherapist can help guide you back to training smarter and feeling your best.

Reference

Fiala O, et al. Understanding overtraining syndrome through the lens of proposed hypotheses: a narrative review. Sports Medicine and Health Science. 2025.