Why Does My Lower Back Hurt After Training?

Lower-back pain is one of the most common issues we see among people who exercise regularly.

Sometimes it appears during a session. Sometimes everything feels fine at the time, only for stiffness or discomfort to develop later that day or the following morning.

This can understandably make people nervous about exercises such as deadlifts, Romanian deadlifts, squats, kettlebell swings and tyre flips. However, it is rarely as simple as saying that one particular exercise is “bad for your back.” More often, discomfort develops because the load, volume, exercise selection or level of fatigue exceeded what the body was prepared to tolerate at that moment.

Is the Exercise Really the Problem?

When someone experiences back pain after a particular exercise, it is natural to blame the movement.

You perform Romanian deadlifts, your back hurts, and the conclusion is that Romanian deadlifts must be dangerous.

In reality, there is an important difference between:

• An exercise being inherently dangerous.
• An exercise being unsuitable for a particular person.
• A sensible exercise being performed with too much load or volume.
• A movement being introduced before someone is ready for it.
• An exercise being completed when someone is already fatigued, stiff or poorly prepared.

Most strength exercises can be appropriate when they are coached well, progressed gradually and matched to the individual.

Problems are more likely to occur when the demands of the session exceed someone’s current capacity.

You May Have Done More Than Your Body Was Ready For

The human body adapts well to training, but it needs time to do so.

A sudden increase in training stress can sometimes lead to pain or irritation, even when the exercises themselves are reasonable.

This could involve:

• Lifting heavier than usual.
• Completing more repetitions or sets.
• Introducing a new exercise.
• Increasing training frequency.
• Returning after illness, injury or a long break.
• Combining gym training with running, football, padel or other sports.
• Training hard despite poor sleep or high levels of fatigue.
• The body generally becomes better at tolerating the demands it is exposed to regularly.

The difficulty arises when those demands increase too quickly.

For example, someone may tolerate two sets of Romanian deadlifts comfortably but experience problems when the exercise is suddenly increased to four sets, paired with tyre flips and completed after a busy week of sport.

The issue may not be the Romanian deadlift itself. The total workload may simply have been too high.

Why Early-Morning Training Can Feel Different

Many people enjoy training early in the morning, and there is nothing inherently dangerous about doing so.

However, some people arrive feeling stiff, sleepy and not fully prepared to produce high levels of force immediately.

This can be particularly relevant for members who already have a history of back problems. If someone has spent the previous evening sitting down, slept in one position for several hours and then rushed straight into a gym session, they may benefit from a more gradual build-up.

This does not mean completing a long or exhausting warm-up.

It simply means taking enough time to raise body temperature, move through comfortable ranges and rehearse the exercises planned for the session.

What Should a Good Warm-Up Include?

A warm-up should prepare you for the session rather than tire you out before it begins.

A sensible progression may include:

1. Raising your body temperature with light movement.
2. Moving your hips, trunk and shoulders through comfortable ranges.
3. Practising the main movement with little or no resistance.
4. Gradually increasing the load.
5. Assessing how your body responds before progressing further.

For example, before completing a loaded hinge exercise, you may begin with bodyweight hip hinges, a light kettlebell or an empty bar.

This gives you and your coach an opportunity to assess how the movement feels on that particular day.

If the warm-up feels uncomfortable, it may be appropriate to reduce the load, adjust the range of movement or choose a different exercise.

Technique Matters, but There Is No Perfect Technique

Technique is important, but it is often misunderstood. There is no single position that every person must achieve. People have different limb lengths, hip structures, training histories, injury backgrounds and levels of mobility.

As a result, two people may perform the same exercise slightly differently while both remaining controlled and effective.

Good technique should allow someone to:

• Maintain control of the load.
• Move through an appropriate range.
• Keep the exercise focused on the intended muscles.
• Avoid unnecessary pain or compensation.
• Repeat the movement consistently.

Technique can influence how force is distributed through the body, but it is not the only factor linked to discomfort.

A person can demonstrate good technique and still experience pain if the load is too heavy, the volume is excessive or they are not adequately recovered. Equally, a movement does not have to look completely perfect to be safe and productive.

Is Your Back Weak?

People with recurring lower-back pain are often told that their back is weak or that their core is not working properly.

This can sometimes create unnecessary fear. Your back is not a fragile structure that must be protected from all bending, lifting or loading. It is made up of muscles, joints, connective tissues and other structures that can adapt to training like the rest of the body.

However, if someone has avoided lifting for a long time, their tolerance to certain movements may be reduced. This does not mean they should never bend or lift again. It means those movements may need to be reintroduced gradually.

Exercises such as carries, split squats, bridges, rows, supported hinging movements and controlled trunk exercises can all help build confidence and capacity. The aim should be to develop a back that is better prepared for the demands of work, sport and daily life.

Should You Train Through Lower-Back Pain?

The answer depends on the symptoms. Mild muscular stiffness or fatigue may settle as you warm up and move. However, pain that becomes sharper, stronger or more widespread during a session should not be ignored.

You should stop or modify an exercise if:

• The pain increases with each repetition.
• You feel a sudden sharp pain.
• Your movement becomes increasingly guarded or restricted.
• The pain travels into the buttock or leg.
• You experience numbness, tingling or weakness.
• You no longer feel confident controlling the movement.
• Training around discomfort does not always mean stopping completely.

In many cases, you may be able to continue with a different exercise, reduced load or shorter range of movement.

For example, a loaded Romanian deadlift could temporarily be replaced with:

• A glute bridge.
• A supported split squat.
• A cable pull-through.
• A machine-based leg exercise.
• A lighter hinge variation.
• A controlled sled push or carry.

The most appropriate option depends on the individual and how their symptoms respond.

When Should You Seek Medical Advice?

Most episodes of lower-back pain improve over time, but some symptoms require professional medical assessment.

You should seek urgent medical advice if back pain is accompanied by:

• Significant weakness in one or both legs.
• Loss of sensation around the groin or saddle area.
• Changes in bladder or bowel control.
• Severe pain following a significant fall or accident.
• Unexplained weight loss, fever or persistent illness.
• Pain that is severe, worsening or not improving.

Persistent or recurring symptoms should also be assessed by an appropriately qualified healthcare professional.

A coach can modify training and help rebuild physical capacity, but they should not attempt to diagnose a medical condition.

How We Manage Back Pain at SPC

At SPC, we do not believe that every person should complete exactly the same exercises in exactly the same way.

If a member experiences back discomfort, we may adjust the session by:

• Reducing the load.
• Reducing the number of repetitions or sets.
• Shortening the range of movement.
• Slowing the exercise down.
• Choosing a more supported variation.
• Replacing the movement temporarily.
• Providing closer coaching and supervision.
• Gradually reintroducing the exercise over time.

For members with a history of back problems, certain movements may be better suited to personal training or a closely coached station.

This allows the coach to monitor technique, loading and fatigue more carefully. The goal is not to permanently remove every exercise that feels challenging. The goal is to find an appropriate starting point and build from there.

A Painful Back Is Not Necessarily a Damaged Back

Pain can be worrying, but it does not always mean that serious damage has occurred.

Symptoms can be influenced by many factors, including:

• Training load.
• Fatigue.
• Sleep.
• Stress.
• Previous experiences of pain.
• Confidence in the movement.
• Overall physical activity.

This is why simply resting until all discomfort disappears is not always the best long-term solution. Rest may help settle symptoms initially, but a gradual return to movement and resistance training is often important for rebuilding confidence and physical capacity. The right approach will vary from person to person.

The Goal Is to Build a More Capable Back

The solution to lower-back pain is rarely to avoid bending and lifting forever. The long-term goal should be to progressively build a body that can tolerate more.

That may involve improving strength, adjusting training volume, refining exercise selection and allowing enough recovery between demanding sessions. A well-designed strength programme should make everyday tasks, work and sport easier to tolerate. Your back is not something that needs to be wrapped in cotton wool.

It needs sensible training, appropriate progression and the confidence to move. At Sussex Performance Centre, our coaches help members train around injuries, improve their movement and gradually build the strength required for everyday life and sport.

To find out more about personal training or coached group training at SPC, contact our team today.