Weight lifting during pregnancy

If lifting weights was already part of your routine before pregnancy, you may be able to continue with some adjustments. Strength training can be part of staying active during pregnancy, but the goal is not to keep lifting exactly as you did before or to push through discomfort.

Pregnancy can change your balance, posture, energy and how particular movements feel. Your routine may need to change with you. If you are new to weight training, have a pregnancy complication or are unsure what is appropriate for you, speak to your midwife or doctor before starting.

Is weight lifting safe during pregnancy?

For many people with an uncomplicated pregnancy, strength training can form part of their pregnancy exercise routine.

The NHS advises people who are already active to continue their normal physical activity for as long as it feels comfortable, unless their maternity team advises otherwise. Tommy’s also states that people who used weights before pregnancy may be able to continue with some changes.

There is no single weight that is considered safe for every pregnant person. Tommy’s notes that there is no official guidance specifying how much weight is safe to lift during pregnancy because what feels light to one person may feel heavy to another.

This makes individual ability, previous training experience, technique and professional advice more useful than trying to follow a universal kilogram limit.

What if you already lifted weights before pregnancy?

If strength training was already familiar to you, your pregnancy routine does not necessarily have to disappear.

You may, however, need to change the exercises you choose, the amount you lift and how hard you train. Tommy’s advises focusing on technique rather than the amount of weight or number of repetitions, and using weights that feel light to moderate rather than heavy.

Pregnancy is not the time to feel pressured to maintain your previous numbers. Your training can change from one week to another depending on how you feel.

Tell your trainer or exercise instructor that you are pregnant. If possible, choose someone who understands pregnancy exercise and can help adapt your programme.

What if you are new to weight lifting?

If you have not used weights before, speak to your midwife or doctor before starting a weight-training programme during pregnancy.

The NHS advises against suddenly taking up strenuous exercise if you were not active before pregnancy. You can still become more active, but building up gradually is a different approach from suddenly beginning demanding strength sessions.

Your starting point matters. Someone who has trained with weights for years will have different experience, technique and capacity from someone picking up weights for the first time.

A qualified instructor with appropriate pregnancy exercise knowledge can also help you choose suitable movements and learn good technique.

How heavy should you lift?

There is no universal pregnancy weight limit that tells every person exactly how many kilograms they can safely lift.

Tommy’s recommends using weights that feel light to moderate rather than heavy and doing more repetitions with lighter weights. It also advises against pushing yourself too hard.

This is especially useful because strength levels vary enormously. A particular dumbbell might feel easy for one person and demanding for another.

The NHS talk test can help you judge your overall exercise intensity. You should generally still be able to hold a conversation while exercising. If you become too breathless to talk comfortably, you may be working too hard.

Technique matters

Good technique becomes especially important as your body changes.

Tommy’s advises keeping good posture during weight training and avoiding holding your breath while lifting. It also recommends focusing on technique rather than chasing heavier weights or more repetitions.

Free weights need extra care because there is a possibility of accidentally hitting your bump. Machines, resistance bands, body-weight exercises or other adaptations may sometimes feel more manageable, depending on your experience and stage of pregnancy.

If you are uncertain about your form, ask a qualified instructor to check it rather than relying on how an exercise used to feel before pregnancy.

Your routine may need to change

An exercise that feels comfortable earlier in pregnancy may not feel right later.

Your centre of gravity changes as your bump grows, and movements may need adapting for comfort, balance and control. The NHS also advises avoiding lying flat on your back for long periods, particularly after 16 weeks, because this can make you feel faint.

Tommy’s gives additional pregnancy-specific guidance about adapting certain weighted exercises and positions as pregnancy progresses. If your usual programme includes heavy barbell work, overhead lifting, exercises performed flat on your back or fast weighted circuits, discuss appropriate alternatives with a qualified pregnancy exercise professional or your maternity team.

You do not need to preserve every exercise in your old programme for your training to count.

Breathing while lifting

Holding your breath while straining through a lift is not recommended during pregnancy.

Tommy’s specifically advises against holding your breath during weight training. Keep breathing normally and avoid turning a repetition into an all-out effort.

If the weight is so demanding that you cannot maintain controlled breathing or good technique, reduce the intensity and seek guidance if you are unsure.

Protecting your back and pelvic floor

Pregnancy places changing demands on your back, abdominal muscles and pelvic floor.

The NHS recommends pelvic floor exercises throughout pregnancy. Tommy’s also advises engaging the pelvic floor before lifting weights and maintaining good posture to help protect your back.

If lifting causes pelvic pain, leaking urine, heaviness, pressure or other symptoms that concern you, speak to your midwife, GP or a pelvic health physiotherapist.

Symptoms do not need to be severe before you ask for help.

Staying hydrated and avoiding overheating

Exercise does not need to leave you exhausted to be worthwhile.

The NHS advises drinking plenty of water during pregnancy exercise and avoiding strenuous exercise in hot weather. Tommy’s similarly recommends keeping cool and drinking plenty of fluids during strength training.

A hot gym, demanding circuit or session that previously felt manageable may feel different during pregnancy. Adjusting your environment, taking more recovery time or shortening a workout can be sensible.

Stop exercising if you feel faint, overheated, unwell or develop pain.

Weight machines, free weights and resistance bands

Strength training does not have to mean lifting a barbell.

Tommy’s lists free weights such as dumbbells, weight machines, resistance bands and suspension trainers among possible forms of resistance training during pregnancy. Body-weight exercises can also strengthen muscles.

Different options have different practical advantages. For example, you may find a machine easier to control than a free weight as your balance changes, while resistance bands may offer another way to train if your usual weights no longer feel comfortable.

There is no need to choose one type simply because it seems more serious or effective. The most suitable option is one that fits your experience, feels comfortable and can be performed with good technique.

What about heavy lifting?

Very heavy lifting is different from moderate strength training.

NHS physical activity guidance classifies lifting heavy weights as very vigorous activity. Tommy’s advises pregnant people using weights to choose loads that feel light to moderate rather than heavy.

This does not create a specific kilogram cut-off, because individual strength and training backgrounds differ.

If heavy lifting, powerlifting, Olympic lifting, CrossFit or another high-intensity strength discipline was part of your training before pregnancy, seek individual guidance about how to modify your programme rather than assuming your usual training should continue unchanged.

When to get professional advice

Speak to your midwife or doctor before weight training if you have pregnancy complications, a medical condition, concerns about your pregnancy or have been advised to restrict exercise.

If you are new to weights, Tommy’s recommends checking with your midwife or doctor before starting.

Stop exercising if you feel faint, overheated, unwell or develop pain or unusual symptoms, and contact your midwife or doctor for advice. Do not train through symptoms because you feel you should finish the session.

Seek maternity advice promptly if you experience vaginal bleeding, fluid loss, regular painful contractions or another symptom that concerns you during pregnancy.

If your baby’s movements have slowed, changed or stopped once you are at the stage where you normally feel movement, contact your maternity unit immediately rather than waiting for your next appointment.

NHS 111 can help with an urgent medical problem when you are unsure where to get care. Call 999 for a life-threatening emergency.