Introduction to Delayed Onset Muscle Soreness
Delayed onset muscle soreness (DOMS) also called muscle fever, is the pain and stiffness everyone is familiar with after strenuous exercises. It is noticeable worse 24 to 72 hours after exercise and it can occur anywhere in the body. However it is more memorable when it affects the lower body i.e. the legs, due to it being so inhibiting.
For a long time the cause of DOMS was thought to be the build up of lactic acid and toxic metabolic waste in the muscles. However this theory has now been thoroughly rejected. While the cause of DOMS is not well understood, the current consensus is that DOMS is a result of inflammation triggered by microscopic tears in connective tissues that sensitise nociceptors and heighten pain.
The pain of DOMS and the sever soreness may decrease capacity to perform in subsequent workouts. In addition to physical symptoms for some people it can decrease motivation to exercise. So is the pain worth the gain? The short answer is no. DOMS doesn’t mean you will build more muscle although it may enhance it a little.
References
Brad J Schoenfeld, 2010, The mechanisms of muscle hypertrophy & their application to resistance training, Journal of Strengthening & Conditioning Research, vol 24, (10)
Related Posts

A surprising benefit of HIIT
Chemotherapy and radiotherapy are the standard approaches to slow the growth of colon cancer - but high intensity exercise can have the same positive effect - a new study has found. Even a short session of high intensity interval training (HIIT) can induce changes in blood cells that slow the growth of colon cancer cells or even kill them off completely. These positive effects were seen after just one exercise session, although the colon cancer patients went on to complete 12 HIIT sessions over a month. Even after the first session, blood samples showed an increase in markers of inflammation, and when cancer cells in the lab wehre exposed to these samples they started dying, researchers at the University of Queensland have discovered. Although earlier studies have shown that intesntive exercise can dlow the growth of cancer cells, the researchers were surprised to see it was also reducing the number of cancer cells, suggesting they were beign killed off. Reference James L. Devin, Michelle M. Hill, Marina Mourtzakis, Joe Quadrilatero, David G. Jenkins, Tina L. Skinner. Acute high intensity interval exercise reduces colon cancer cell growth. The Journal of Physiology, 2019

Reflexology: Scientific Evidence of it’s effects physiological anxiety signs
Recently a scientific study (see details below) was published which evaluated the physiological anxiety signs and sedation needs of patients in intensive care units in a Turkish hospital.
Background It is an accepted medical fact that when it is necessary to mechanically ventilate patients in intensive care units of hospitals, the patients experience stress and anxiety. It is standard medical practice to relieve anxiety, pain, agitation with sedatives to ensure patient comfort. Sedatives however also have side effects causing high blood pressure, slow heart beat, coma, respiratory depression, muscle weakness and atrophy, increased risk of pneumonia, kidney problems and immunosuppression. It may also prolong the need for ventilation which in turn increases the risk of complications. Method 60 patients were split into two groups one of which was the control group. Sedation (Propofol) was reduced 30 min before treatment (or no treatment) which resulted in patients with mixed consciousness to which the outcome measure was administered. This was the American Association of critical care nurses sedation assessment scale (AACNSAS) and the vital signs recorded. Reflexology applied to ears, hands and feet bilaterally was given twice a day for a total of 30 minutes per day, over 5 days. The reflexology focussed on the brain, cortex, hypothalamus, hypophysis and subcortex; areas though to influence anxiety, agitation and stress response. No reflexology was given to the control group but the sedation was reduced and all the same measurements were taken. Results The physiological signs of anxiety and stress i.e. blood pressure, heart rate and respiratory rate were are reduced in the group that received reflexology on each of the 5 days. In addition there was a reduction in the requirement for sedatives in the group that received reflexology. Conclusions These findings ‘show that reflexology is an effective treatment in reducing the physiological signs of anxiety and stress in patients receiving mechanically ventilated support.’ This study provides scientific evidence to underpin the idea that reflexology has a beneficial effect on anxiety and stress.Title: Reflexology: It’s effects on Physiological Anxiety Signs and Sedation Needs Journal: Holistic Nursing Practioner Authors: E. Korhan, L. Khorshid, M Uyar Reference: 2014; 28 (1);6-23 Study Type: Randomised Controlled Trial - with control group receiving no treatment


