Pulling on my barefoot running shoes, I chose to run the 2 miles to the gym as part of my warm up. I’m not yet accustomed to the altered calf loading from barefoot running, and as I completed my gym session, my calves began to feel tight — but I still have the run home. Fast-forward a couple of days and my calves are shot and I’m walking around like I’ve soiled myself!

You’ve all experienced the pleasures of DOMS or Delayed Onset Muscle Soreness, that usually peaks between 48-72 hours after exercise. Some of you may even crave it, to feel like you’ve had a good workout. But, is it desirable? Exactly how does it affect your training? How can you prevent it?

Although DOMS is a very common symptom, its underlying mechanisms and the reason for the delay are not clearly understood (Nosaka). We know that muscle soreness occurs as a result of damage caused by doing something that the structures aren’t adapted to. This could be a significant change in volume and intensity, or performing a new movement through a different range of motion (ROM). What’s also understood is that  eccentric (lengthening) muscle actions are responsible for soreness, not the concentric (shortening) contractions.

The Effect of DOMS on Training

Following muscle damage, structural system recovery can take up to 3-days to complete, sometimes longer if the damage is severe. This is a major concern for both coaches and Thai boxers since exercise-induced damage can significantly impair athletic performance, wasting several days of productive training. In fact, skeletal muscle damage following eccentric exercise has repeatedly shown a significant loss in muscle function — resulting in a loss of static and dynamic muscle force, reduced range of motion, or simply an inability to perform athletically as normal. It’s been demonstrated that during DOMS, muscle forces can drop by as much as 60% and not always fully restored until 8-10 days after exercise (Clarkson et al).

It ‘s therefore necessary to minimise the amount of structural system damage that occurs, or power and range of motion are adversely affected. This is especially important for a sport like Muay Thai, requiring a great deal of explosive power and flexibility.

Weight Training and DOMS

Used correctly, athletic weight training develops maximum strength, power and range of motion, with little or no structural damage or detrimental affect on subsequent Thai boxing training. However, using a bodybuilding hypertrophy programme or heavy eccentric work will cause muscle damage, making you stiff, sore, and adversely affect your Muay Thai sessions.

Treating DOMS

It can take days to recover from DOMS, however that doesn’t mean you should just rest. Research has shown that performing a second bout of (even maximal) exercise may be painful, but doesn’t impair the recovery process (Paddon-Jones et al). This highlights the importance of distinguishing between DOMS and a muscle strain injury.

Although subsequent exercise may not adversely affect your recovery time, it’s widely recognised that it won’t help it either. And the same goes for other therapeutic interventions such as ice, massage and NSAIDS — they may slightly alleviate pain but they won’t affect recovery from structural muscle damage.

 Avoiding DOMS

Training volume and intensity should be progressively increased in manageable increments to avoid DOMS. Don’t jump steps. If you suddenly double the length of time that you train, distance that you run, or intensity, you’ll  get sore. If you introduce a new movement or range of motion to your training, this progression must be built again. Take my calves for example. They’re adapted to Muay Thai training, strength training, plyometrics, even orthodox running — but they’re certainly not used to barefoot running! I must build the intensity and volume of eccentric muscle actions to avoid blowing out my calves. Try increasing the volume of any new longer duration activity in no greater than 20% increments each week to allow sufficient adaptation.

Repeated Bout Effect

The only proven method of protecting against DOMS and preventing exercise-induced damage is to perform a prior bout of similar eccentric contractions at a lower intensity. This method is known as repeated bout effect or RBE (Eston et al). According to Nosaka, RBE appears to last for weeks as opposed to days.

However, it’s important to emphasise that the RBE only transfers to subsequent bouts if it’s extremely similar to the initial bout. Research has also found that an initial bout of eccentric exercise of less than 10% of the volume of the subsequent bout is sufficient to reduce DOMS and promote faster recovery due to RBE, even up to 2-weeks later (Nosaka et al). Therefore to benefit from the protection of the repeated bout effect, it’s not necessary to perform a high number of eccentric muscle actions. However, as well as number of eccentric actions it’s also important to consider the range of motion to create an effective RBE.

 A Few Final Points for Coaches

Coaches should avoid training to develop maximum strength and power if a boxer is experiencing DOMS in affected muscle groups, due to the drop in strength and range of motion. Caution should also be used when training technique to avoid repeating bad movement patterns and interfering with skilled technique. Ensure you distinguish between a muscle strain and DOMS before prescribing exercise.

Coaches should utilise the RBE to pre-train specific muscle groups to provide protection from future more severe training regimes. This should also be considered when a fighter returns from a lay off from training.

It’s also recommended that coaches don’t introduce new eccentric loading movement, such as plyometrics, within 14 days of competition to prevent a fighter suffering from muscle damage that will impair their performance.


  1. News | Super Fight Series December 10, 2012 at 5:37 pm - Reply

    […] Link: Muscle Soreness & Muay Thai Training Don Heatrick posted a link to SUPER FIGHT SERIES CHAMPIONSHIP's wall: DOMS or Delayed Onset Muscle Soreness, peaking between 48-72 hours after exercise… Is it desirable? How does it effect your training? How can you prevent it? […]

  2. Mark Plunkett December 11, 2012 at 12:10 am - Reply

    I always get DOMS when I do squats or deadlifts. So to prevent this I should do a light session a week before ?? So maybe one week light one week heavy to get the benefit of RBE. Am I understanding this correctly ?

    • DonHeatrick December 11, 2012 at 12:47 pm - Reply

      Hi Mark,
      Yes you’ve got it. Performing lighter squats and deadlifts over the FULL range of motion the week before will severely reduce the severity of DOMS. This is even more important if you’re returning to training after a lay off ;).

      Doing a few sets of a couple of body-weight drop-squats as part of your warm up will help too.

      Regards, Don

  3. DonHeatrick December 11, 2012 at 12:53 pm - Reply

    Rich Cadden posted via Facebook:

    What effect does rehydration/nutrition/supplements/massage have on speed of recovery?

    • DonHeatrick December 11, 2012 at 12:54 pm - Reply

      Hi Rich. Good nutrition and hydration will always help reduce recovery time, but numerous studies designed to alleviate DOMS have had various degrees of success.

      Ice therapy, hyperbaric oxygen therapy, massage, antioxidants, anti-inflammatory drugs, diet interventions, acupuncture and concentric exercise have all been researched and found to be questionable.

      Ice therapy, massage, anti-inflammatory drugs and light concentric exercise have all been found to have some analgesic effect, but doesn’t speed recovery.

      The only method that consistently proves to reduce the severity of DOMS is the ‘repeated bout effect’ that I describe in the post.

      I hope that helps? I’ll post this question and answer in comments below the post to help others too :)

  4. DonHeatrick December 11, 2012 at 3:07 pm - Reply

    Rich Cadden posted via Facebook:

    Can you tell us a bit more about “Repeated Bout Effect” as it sounds a bit complicated. I have never heard of it before.
    Is it just like the tapered training (increasing 10% each week)?
    How would this carry over in to muay thai? For instance, doing 10/15/20 steady kicks (30/40% power) before doing any 100% power kicks (Sam-A style)?

    • DonHeatrick December 11, 2012 at 3:08 pm - Reply

      I’ve suggested using a rough rule-of-thumb of increasing the volume of newly introduced longer duration activity by no more than about 10% each session either time, distance, reps whatever makes sense). This is a suggested general volume progression, not a RBE specific protocol. For example, if you’re returning to running after a knee injury and begin with a 1.5 mile run, go out for about 1.7 the next time, then 2 miles, then 2.3 miles etc. It’s a cautious, rough guide. Your starting level and the percentage increase you can tolerate depends on the activity and your current level of conditioning to it. It’s not a strict rule and use your own experience to tailor progressions. But, it does provide a safe way of loading people progressively without injuring or overly fatiguing them.

      To specifically employ RBE as a protective strategy, the research suggests just 10% of the volume of the subsequent bout is enough to provide some protection against DOMS. Therefore a 90% increase between the initial an subsequent bout of exercise! I would suggest that a certain amount of ‘keeping your hand in’ using a low volume of certain movements will serve to protect against severe DOMS by using RBE.

      If you find that you’ve become uncharacteristically sore after training, examine what new ranges of motion or changes in volume and intensity of eccentric movement could have triggered the soreness. It would then be worth adding some periodic RBE exercise to guard against it in the future. And if you’re deliberately adding new eccentric loading, precede it with some preparatory RBE movements of a suitable volume the week before.

      10/15/20 steady (30/40% power) kicks would certainly serve as RBE for 100% power kicks performed on a different occasion.

  5. […] Muscle Soreness & Muay Thai Training […]

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