Poor muscle strength predicts increased vulnerability to both physical & psychological health problems and earlier death, in addition to the contribution of poor aerobic, heart-lung fitness.  This is true for both men & women and for all assessed age ranges.  Mechanisms underlying these effects are probably multifactorial, including metabolic/biochemical, neurological & psychological factors.  Research studies have assessed overall muscular strength in a variety of ways including grip strength, push-ups, chair-stands, and squat weight-lifts.  Happily, muscle strengthening interventions can yield major benefits across multiple health domains.  Here are a dozen interesting papers addressing these areas published in the last few years:

I wrote yesterday about the two pre-European Conference on Positive Psychology (ECPP) workshops I went to on "Positive supervision" and on "Positive relationships".  Then in mid-afternoon on Tuesday, the conference proper began.  It was heralded by Taiko drummers and a cluster of brief welcoming speeches.  Apparently there are 920 people at the conference from about 50 different countries.  The country spread is similar, but the numbers are up 50% on the approximately 600 attendees at the 5th ECPP I went to in Copenhagen four years ago.

I was struck by a paper published this month in the journal Archives of General Psychiatry - "Effect of purpose in life on the relation between Alzheimer disease pathologic changes on cognitive function in advanced age".  The authors wrote "In recent years, systematic examination has shown that purpose in life is associated with a substantially reduced risk of incident AD (Alzheimer disease), mild cognitive impairment, disability, and death.

It is clear that there is a U-shaped association between sleep duration and mortality, with both short and long sleep linked with increased death rates.  This finding is underlined by two major recent research overviews - Gallicchio & Kalesan "Sleep duration and mortality: a systematic review and meta-analysis" and Cappuccio et al's "Sleep duration and all-cause mortality: a systematic review and meta-analysis of prospective studies".  There is so much interesting that one could write about this, but this particular blog post is triggered by a personal query that I have.  I try hard - and am mostly successful - to have a very healthy lifestyle.  I eat well, exercise well, keep a sensible weight, don't smoke, don't d

There has been a ripple of media interest - and rightly so - in the recent Lancet article  "Minimum amount of physical activity for reduced mortality and extended life expectancy: a prospective cohort study."  The article's abstract reads "The health benefits of leisure-time physical activity are well known, but whether less exercise than the recommended 150 min a week can have life expectancy benefits is unclear.  We assessed the health benefits of a range of volumes of physical activity in a Taiwanese population.  In this prospective cohort study, 416,175 individuals (199,265 men and 216,910 women) participated in a standard medical screening programme in Taiwan between 1996 and 2008, with an average follow-up of 8·05 years (SD 4·21).  On the basis of the amount of weekly exercise indicated in a self-administered questio

A new meta-analysis in the Journal of the American Medical Association tells it like it is: television viewing damages our health.  The paper's title is "Television viewing and risk of type 2 diabetes, cardiovascular disease, and all-cause mortality" and its abstract reads:

So Friday was the "conference proper" - seven talks and a plethora of 'introducers'.  Sometimes 'introducers' introducing chair people who then introduced the speakers.  What a lot of different faces/different voices.

The August 11th edition of the British Medical Journal reported: "Having strong social relationships seems to have an effect on survival comparable to that of quitting smoking and larger than controlling traditional risk factors, such as obesity or hypertension. A meta-analysis of social relationships and mortality looked at 308,849 participants aged 63.9, on average, at baseline; 29% died during the follow-up of 7.5 years.  Overall, strong social relationships improved the odds of survival by 50%. Similar results were found for two aspects of relationships, defined by the researchers as structural (integration in social networks) and functional (received or perceived social support), although the link with integration was somewhat stronger.