THE PHYSIOLOGY OF DOMS

• Scientific studies have shown that eccentric action, defined as muscle lengthening during contraction, is the main cause of DOMS.

• Activities such as downhill running, horse riding and the ‘down’ phase of squats or bicep curls, are eccentric in nature.

• A 2004 study published in the Journal of Physiology showed that when participants were assigned to treadmill running uphill, downhill or on a level surface, only those in the downhill group experienced DOMS up to 48 hours after exercise.

• Further studies have shown that people who focus their training on concentric exercise (contractions that shorten the muscle) are more susceptible to experiencing DOMS after doing eccentric exercise.

The severity of DOMS does not always correlate with how hard a person has exercised / shutterstock.com

Dr Jinger Gottschall,

Associate professor of kinesiology ,

Pennsylvania State University

Dr Jinger Gottschall

Because DOMS is caused by small muscle tears, rather than a buildup of lactic acid in the muscle, it can be a sign that muscle fibres are increasing in diameter or getting longer. However, daily muscle discomfort and soreness is not ideal as this suggests that adequate recovery – which is when muscle growth and repair occurs – is not happening. Conversely, a complete absence of DOMS for a long period of time is also far from ideal and should be taken as an indication that you can switch up your routine or increase workout time or intensity. It’s a tricky balance, especially as genetic differences mean that not everyone feels the effects of muscle breakdown in the same way: some may be more sensitive to pain, and therefore DOMS, than others.

While mild DOMS can be seen as positive reinforcement that a session was successful and muscle training is occurring, for those who want to avoid it, soreness can be minimised by starting slowly and adding thoughtfully.

Complicated routines and equipment are not vital. Simple strategies, namely beginning with 10 to 15 minute sessions and gradually building up over a six week period, significantly reduce the chances of soreness. PTs can also help gym-goers to minimise DOMS by advising them to avoid increasing time or intensity by more than 10 per cent each week. Strength training should not be done on consecutive days and one day per week should be a complete rest day.

“A complete absence of DOMS for a long period of time is also far from ideal and should be taken as an indication that you can switch up your routine”

Leon Popplewell,

Community sports manager,

GLL

Leon Popplewell

Muscle soreness may not act as a deterrent to exercise for bodybuilders, but it certainly does for our target market – members of the general public who are new to exercise. People generally have jobs, responsibilities or children, so they don’t want what they do in the gym to impact on their ability to carry out their everyday life. With this in mind, minimising DOMS is something we take seriously, in order to create an inclusive environment.

Firstly we make it clear to members during their inductions that they may ache after exercise. We also go to great lengths to try and minimise their aches and pains. As well as information charts on the walls in our centres, which explain warm-up techniques and effort levels, all new members have an initial screening with an instructor, going through a lifestyle questionnaire, as well as fitness testing to identify weaknesses.

All members are given a foundation programme: an introduction to the machines, using lighter weights and getting them used to the technique. This allows them to get used to the equipment, work on their weaknesses and improve their flexibility, before starting a more intensive programme. The length of time taken to adjust varies according to the individual, but for someone in their 40s who is new to fitness, a month is usually enough if they’re coming twice a week.

It can be harder to avoid DOMS in group classes, as people often feel obliged to try and keep up. However, we screen people before classes and also offer introductory classes, where they can learn the technique and understand the concept before embarking on the full class – as well as ensuring classes include extensive warm-ups and cool-downs.

“It can be harder to avoid DOMS in a class environment, as people often feel obliged to try and keep up”

Matt Bolam,

Head of training,

Speedflex

Matt Bolam

Many regular fitness sessions are high impact, and this can leave the average person feeling both sore and like they don’t belong. When I worked as a PT, some of my introductory sessions would leave clients with DOMS and I could see this was a barrier in terms of getting people to adhere to an exercise programme. It definitely put some people off and I even lost clients as a result. But over the years I have learned it’s possible to get an effective workout with little to no muscle soreness afterwards, and this keeps people coming back.

Speedflex, for example, offers a resistance machine-based high intensity circuit training session that leaves participants without DOMS. It was designed specifically with this goal in mind, and achieves this by delivering concentrically focused exercise. When you do a bicep curl, the muscle shortens and contracts to lift the weight, which is the concentric movement. When the weight is lowered, the muscle performs an eccentric movement as the muscle lengthens and takes the stress of the weight. It’s the eccentric movement that causes DOMS. For this reason, those seeking to avoid DOMs would do well to adopt training strategies, such as dropping weights rather than lowering them during strength training and running uphill instead of downhill.

With Speedflex, the machine takes the load off the muscle as it lengthens, so opposing muscle groups are used to complete the movement in its entirety. As a result, even though Speedflex sessions burn lots of calories,and improve CV fitness and body composition, the workouts do not cause DOMS, which is what many of our clients want.

“When I worked as a PT, some of my introductory sessions would leave clients with DOMS. It definitely put some people off and I even lost clients as a result”

Speedflex was designed to provide an effective DOMS-free workout without

Jill Brown,

Founder,

Jill Brown Fitness

Jill Brown

Soreness is not necessary for improving cardiovascular fitness; however, it is often a side effect of the process by which new muscle is built. This means that those who are very focused on avoiding it can require more time and patience to achieve fitness goals that involve gaining new muscle.

Nonetheless, everyone is different and the presence of DOMS doesn’t guarantee significant muscle growth. Some people have more sensitive nerves and experience more soreness than others who may have worked harder, but feel less sore the day after The severity with which DOMS is felt can even vary depending on the medication a person is taking. In short, I don’t think someone must feel sore to increase their muscle mass. What is needed is to overload the muscle. As long as a member is regularly increasing the volume or intensity of their training, he or she doesn’t have to worry.

There are a few protocols that people can do to help safeguard against muscle soreness. Foam rolling before or after the workout, can help to minimise soreness by stopping muscle fibres from knotting and contracting. A good workout-specific warm-up and post-workout stretch helps, as do hot and cold plunges or a sports massage. Some protein before and after the workout can help the muscle repair process.

DOMS doesn’t have to be a deterrent to exercise or actively prevented to keep members coming back, so long as newcomers are informed that when the body is moved in a new way and muscles that haven’t been activated before are used, there may be some soreness.

"As long as a member is regularly increasing their volume or intensity of their training, he or she doesn’t have to worry"