Could fish oils help prevent miscarriages?

I said in a previous post that scientists are interested in finding out how massage works.  So if we accept that massage reduces muscle pain, that leaves the question, "How does massage reduce muscle pain?". In 1965, Ronald Melzack and Patrick Wall outlined a scientific theory about psychological influence on pain perception; the ‘gate control theory’.  According to the gate control theory, pain signals are not free to reach the brain as soon as they are generated at the injured tissues or sites. They need to encounter certain ‘neurological gates’ at the spinal cord level and these gates determine whether the pain signals should reach the brain or not. In other words, pain is perceived when the gate gives way to the pain signals and it is less intense or not at all perceived when the gate closes for the signals to pass through. Cutaneous mechano-receptors are stimulated by touch (massage) and transmit information within large never fibres to the spinal cord.  These impulses block the passage of painful stimuli entering the same spinal segment along small, slowly conducting neurons. This theory gives the explanation for why someone finds relief by rubbing or massaging an injured or a painful area. For example, the pain gate theory explains "how"  a child feels better after mum or dad intuitively rub their knee when they have fallen over. In summary massage produces short term pain relief by being a particularly effective trigger for the pain gate process. References Melzack R, & Wall PD (1965). Pain mechanisms: a new theory. Science (New York, N.Y.), 150 (3699), 971-9  Moayedi M, & Davis KD (2013). Theories of pain: from specificity to gate control. Journal of neurophysiology, 109 (1), 5-12 Jacobs M. (1960) Massage for the relief of pain: anatomical and physiological considerations.  Physical Therapy Review, 40: 93-8 Melzack R, Wall PD. Pain mechanisms: a new theory. Science. 1965 Nov 19;150(3699):971–979. Wells PE, Frampton V, Bowsher D. (1988) Pain: Management and Control in Physiotherapy.  Heinemann Medical.  Chapter 13. Watson J. (1982) Pain mechanisms: a review.  1. Characteristics of the peripheral receptors.  Australian Journal of Physiotherapy.  27:135-43

In part 1, I looked at the impact of sitting on your muscles, but what happens in the rest of your body? Leg Disorders We are all familiar with the risk of deep vein thrombosis (DVT) if we take long flights.  This is because sitting for long periods of time slows blood circulation, which causes fluid to pool in legs.  This creates problems ranging from swollen ankles, varicose beings to dangerous blood clots. Soft Bones Osteoporosis is a disease marked by reduced bone strength leading to an increased risk of fractures, or broken bones. Bone strength has two main features: bone mass (amount of bone) and bone quality.  Osteoporosis is often called a “silent disease” because it usually progresses without any symptoms until a fracture occurs or one or more vertebrae (bones in the spine) collapse.   Weight-bearing activities such as walking and running stimulate hip and lower-body bones to grow thicker, denser and stronger.  Medical researchers partially attribute the recent surge in cases of osteoporosis to lack of activity. Garrett, Brasure et al, 2004, Physical Inactivity Direct Cost To A Health Plan, American Journal of Preventative Medicine; Vol 27 No 4, Pages 304–309 See http://www.ajpmonline.org/article/S0749-3797%2804%2900191-6/abstract?cc=y Weight Gain As the body slows down while in a resting and seated positions, the metabolism naturally slows down.  Calories are burned at a far lower rate, when you sit, you burn only about one calorie a minute!.  For some people this can lead to weight gain becoming an issues.  Being overweight is a known risk factor for many common chronic conditions including

• diabetes
• gallstones
• hypertension
• heart disease
• stroke

I have been wearing glasses since I was a teenager, so I am always interested in how to protect my eyesight.  One of the most common cuases of failing eyesight as we get older is age related macular degeneration (AMD). Scientists tracked the diets and eye health of over 2,000 people who were at least 49 years old at the start of the study.  The people's eye sight and diet were then tracked over the next 15 years.  The researchers discovered that those eating between 100 - 142mg of vegatable nitrates were less likely to have the early signs of AMD.  Currently once AMD starts medicine has no answers and it can in some cases cause blindness. This means prevention of AMD is very important. Vegatable nitrates found in leafy green vegatables and beets reduces the risk of developing AMD by 35%.  100g of spinach contains 20mg of nitrate.  One serving of spinach is 30g, so you would need ot eat 3 servings. Reference Gopinath B, Liew G, Kifley A, Lewis JR, Bondonno C, Joachim N, Hodgson JM, Mitchell P. Association of Dietary Nitrate Intake with the 15-Year Incidence of Age-Related Macular Degeneration. J Acad Nutr Diet. 2018 Dec;118(12):2311-2314