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March 3, 2019 By Irv Rubenstein

REAL News – March 2019

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REAL News March 2018

 March 2019

Old Folks’ Drop-Out Rates & Predictors Matter

A multi-national study followed 1514 male and female Norwegians (avg. age 72) participating in a structured exercise program for 3 years. All subjects were tested for cardiovascular fitness, muscle strength, body mass index (BMI), and mental and physical health, including medications. One half was offered 2 supervised sessions/wk with a mandatory session once every 6 weeks. These folks were divided into a moderate-intensity (MIT) and high-intensity interval training (HIIT) groups.  The other half was asked to follow 2012 Norwegian national guidelines of 30 minutes of moderate activity nearly daily. All were re-evaluated at the end of the first and third years for participation and drop-out rates.

Drop-out rates were higher for those who were (1) randomized to the supervised exercise program, (2) had lower education levels, (3) did less than 30 mins/day of exercise, (4) had lower cardiorespiratory fitness and (5) had lower grip strength (a surrogate for overall strength.) Reduced memory status was not a predictor for 1st year drop out but was for 3rd year drop out rates. Total drop-out rates were 11% after a year and 14.9% after 3 years.

REAL News - March 20191

In conclusion, as the largest and longest study of this sort, the authors suggested that ‘participant burden’, by being randomized to supervised exercise, may be a disincentive to engage in regular exercise. Perhaps the ‘degree of obligation’, at imposed by outside entities, especially when asked to catalogue their activities after each session, might be a de-motivator for many. The clear benefit of being better educated overall, when it comes to participation in studies or programs designed to enhance health, could be confounded by the fact that better-educated people tend to be healthier in the first place, making it more likely they’d be apt to engage in regular exercise regardless.                    

MSSE Jan. 2019

Sport and Female Athlete Triad Risk Influence Bone Density

The Female Athlete Triad (FAT) is the term applied to low energy availability (insufficient caloric intake), disrupted or absent menstrual cycles and low bone mineral density (BMD). Some sports are more clearly associated with the FAT, such as long-distance running, dance, and diving.

A multi-center study compared BMD in 239 female college athletes of 16 sports. The sports were divided roughly by the amount of impact (with the ground) and directionality: high-impact (e.g. volleyball, gymnastics), low-impact (e.g. cross-country), no-impact (e.g. swimming/diving, rowing, water polo) and multidirectional (e.g. basketball, soccer). The risk for FAT was based on analyses of calorie intake, body mass index (BMI), timing of first menstrual cycles and frequency of periods over the past year, and history of stress reaction/stress fractures.

REAL News - March 20192

Only 10% of the athletes had low BMD, primarily in low- and non-impact sports. High-impact and multidirectional athletes had higher BMD than athletes in the other two groups. Cross-country runners, swimmers and divers and synchronized swimmers had the lowest BMD.

Any woman who had either of the FAT risk factors was likely to have reduced lumbar spine BMD. Low body weight/body fat and irregular menses “remained robust independent predictors of both” low spine and low total body bone density. Too, having any but particularly the two more critical elements of the FAT – low BMI and irregular menses – was a greater predictor of lower BMD regardless the sport. A BMI  of 18.4 or lower (less than 17.5) put any female athlete at risk for low bone density.                                        

MSSE Dec. 2018

Tid Bits

“Text Neck”. You’ve seen it if you’ve seen teens, or yourself, futzing with your cell phone. A study in the Journal of Physical Therapy found that 68% of 315 college-age students experienced muscle pain from using a tablet, with 85% having neck pain and 65% complaining of back and shoulder pain. How to prevent pain? Good posture, of course. Raise the device to near-eye level, and sit tall, as your mother told you.                                               UC-Berkeley Wellness Feb. 2019

 

A Harvard-based study (VITAL) placed almost 26,000 adults over 50 to either (1) an Omega-3 capsule+placebo, (2) Vitamin D+placebo, (3) both supplements, (4) two placebos. After ~5.3 years, neither supplement reduced the overall incidence of major cardiovascular events or cancer. However, omega-3 did reduce heart attacks some but not strokes or mortality compared to placebo; those who ate little fish got more benefit when it came to heart attacks than those who ate fish; normal-weight vitamin D takers had reduced cancer rates but not the obese.                                                                                                                                       UC-Berkeley Wellness Feb. 2019

 

Function-focused cuing works better than appearance-based cuing, especially for college-aged females. A Journal of Clinical Sports Psychology study compared 203 young women separated into one of two strength-and-conditioning classes of 16-minutes. One class instructor cued with phrases that pertained to what role the exercises had in maintaining or supporting function; the other instructor talked about how the exercises made you body look. The former class participants had ‘significantly greater increase in body satisfaction and positive affect’ while the appearance-based participants tended to ‘internalize cultural messages about how they should look’ which detracts from future exercise quality and adherence.             ACSM Health & Fitness Journal Jan./Feb. 2019

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Filed Under: Real News Tagged With: bone density, bone mineral density, exercise intensity, field of health or exercise science, Heart Health, senior fitness

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