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All posts; Tags Include "Toxicology"

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  • November 10, 2012
  • 12:03 AM
  • 1,212 views

Is BPA dangerous or not?

by Andrea Kirk in WODMasters






The answer to the question "Is BPA Dangerous?" has not been answered yet.  



Scientific research about endocrine disruption is becoming increasingly politicized.  This is a shame.  Research should be rational and independent of wishes, agendas and demands.  Scientists are human, of course.  It can be difficult for people to be completely objective.  That is why scientists undergo many years of training and mentoring before they receive their degrees.  A ........ Read more »

  • November 10, 2012
  • 12:02 AM
  • 844 views

CrossFit, Health and Water Bottles: Is BPA dangerous or not?

by Andrea Kirk in WODMasters

The answer to the question "Is BPA Dangerous?" has not been answered yet.  Most people in the CrossFit community are very health aware.  But there seems to be an interesting complification (new word) with the high value placed on toughness.  For example, eating Paleo is tough.  Good.  Pushing yourself in CrossFit workouts is tough.  Good.  Concern for global warming is not tough.  (wussy topic).  Recycling is not tough (wussy topic).  Concern abo........ Read more »

  • November 3, 2012
  • 05:40 PM
  • 1,116 views

CrossFit: Protein intake and recovery for Masters Athletes

by ABK in Environment and Health








How much protein do Masters Athletes need?

Younger athletes may benefit from increased protein intake in a number of ways. Increased protein intake may result in muscle strength gains in young adults in as quickly as six weeks (Candow et al. 2006).  Protein supplements may also increase strength in elderly people (average age 83) as well (Bjorkman et al. 2012).  The Bjorkman study of 106 elderly men and women showed a 2.1% gain in body weight with a high-leucine whey protein s........ Read more »

  • October 31, 2012
  • 09:30 AM
  • 1,188 views

CrossFit and Supplements: What is Leucine?

by Andrea Kirk in WODMasters






What is leucine?
Leucine is a branched chain amino acid (bcaa). A lot of people in the CrossFit and Paleo communities are either strongly for it, or strongly against it.   Researchers have identified it as a signal for muscle synthesis in animals. So, there's good a good chance it would do the same in people.   It has been studied as a supplement for humans. A number of these studies have shown increased muscle synthesis and faster recovery in both older and younger men. Wastin........ Read more »

  • October 30, 2012
  • 10:14 AM
  • 1,205 views

Protein intake and recovery for Masters Athletes

by Andrea Kirk in WODMasters








How much protein do Masters Athletes need?
Younger athletes may benefit from increased protein intake in a number of ways. Increased protein intake may result in muscle strength gains in young adults (Candow et al. 2006).  Protein supplements may also increase strength in elderly people (average age 83) as well (Bjorkman et al. 2012).  A recent study of 106 elderly men and women showed a 2.1% gain in body weight with a high leucine whey protein supplement vs. a 1.9% loss in wei........ Read more »

  • October 30, 2012
  • 08:55 AM
  • 1,153 views

Women should train for pull-ups for more than three months".

by ABK in Environment and Health




A recent New York Times blog post was entitled "why women can't do pullups."  Another news article states "even fit women can't do pull-ups".  These are interesting headlines, especially to women who can do pullups. The headlines refer to a study at the University of Dayton (can't find the study itself, sorry) that attempted to train women to do pull-ups over a short period of time.



Women and girls work on pull-ups at CrossFit Seven in Fort Worth, TX.


Yes, women and girls can d........ Read more »

Johnson D, Lynch J, Nash K, Cygan J, & Mayhew JL. (2009) Relationship of lat-pull repetitions and pull-ups to maximal lat-pull and pull-up strength in men and women. Journal of strength and conditioning research / National Strength , 23(3), 1022-8. PMID: 19387371  

  • October 26, 2012
  • 07:33 PM
  • 1,023 views

Protecting children from Celiac Disease.

by ABK in Environment and Health





I've written several articles about gluten, microbes and auto-immunity.   All those interactions are interesting to think about. Like tinkering with puzzles.  However, protecting children from Celiac Disease is an important issue.  Celiac disease is a problem of auto-immunity and exposure to the plant protein gluten.  It can be a rough road, especially for children.  They can't eat the same things other children eat.  Other kids and even adults may not unde........ Read more »

Szajewska H, Chmielewska A, Pieścik-Lech M, Ivarsson A, Kolacek S, Koletzko S, Mearin ML, Shamir R, Auricchio R, Troncone R.... (2012) Systematic review: early infant feeding and the prevention of coeliac disease. Alimentary pharmacology , 36(7), 607-18. PMID: 22905651  

  • October 26, 2012
  • 07:23 PM
  • 1,252 views

CrossFit and Paleo: Quinoa, protein, anti-oxidants and saponins.

by ABK in Environment and Health




What is Quinoa?


Quinoa is (are?) seeds from a broad-leaf plant.  Grains are from grasses.  When cooked quinoa tastes mildly like toasted broccoli.  This is not as bad as it sounds.  Quinoa is grain-like and can be used in place of rice or pasta.  They are good for breakfast with nuts and cinnamon.   Quinoa does not contain Gluten.  So if you have celiac disease, or gluten sensitivity you should be fine with Quinoa.  If you are trying to eat Paleo, qu........ Read more »

  • October 26, 2012
  • 09:26 AM
  • 1,182 views

Women should train for pull-ups for more than three months".

by Andrea Kirk in WODMasters



A recent New York Times blog post was entitled "why women can't do pullups."  Another news article states "even fit women can't do pull-ups".  These are interesting statements, especially to women who can do pullups.  The author of the Times blog post notes that there are lower expectations for women to do pull-ups.  For example, in US physical fitness assessments girls are categorized as "fit" if they can do 2 pull ups, while boys are not categorized as fit unless they can........ Read more »

Johnson D, Lynch J, Nash K, Cygan J, & Mayhew JL. (2009) Relationship of lat-pull repetitions and pull-ups to maximal lat-pull and pull-up strength in men and women. Journal of strength and conditioning research / National Strength , 23(3), 1022-8. PMID: 19387371  

  • October 24, 2012
  • 12:05 PM
  • 838 views

Cannabis Use and Car Accident Risk

by William Yates, M.D. in Brain Posts

In a previous post, I summarized a recent study of the relative contribution of cannabis and alcohol to motor vehicle accident (MVA) risk.   This Belgium study estimated that risk of motor vehicle accident with cannabis use was comparable to that of alcohol at a blood alcohol concentration of about 0.8 to 1.0 g/L.The Belgium study estimated the odds ratio for motor vehicle risk with cannabis at about 5.8.  Asbridge and colleagues recently published a review of acute cannabis consumptio........ Read more »

  • October 21, 2012
  • 11:23 AM
  • 1,033 views

CrossFit Research: Endurance, Resistance or Alternating Workouts?

by ABK in Environment and Health







Two Paleo CrossFit-ters discuss something at CrossFit Seven in Ft. Worth.

Which is better?  Should you do endurance exercise first and then resistance?  Or resistance training and then endurance?  It looks like alternating your routine gives the best results in terms of performance.  New research published this month reports on the effectiveness of mixed exercise routines in women.  Groups of untrained women were asked to do one of the following:


1. Run on ........ Read more »

Green JM, Wickwire PJ, McLester JR, Gendle S, Hudson G, Pritchett RC, & Laurent CM. (2007) Effects of caffeine on repetitions to failure and ratings of perceived exertion during resistance training. International journal of sports physiology and performance, 2(3), 250-9. PMID: 19168925  

  • October 19, 2012
  • 06:52 PM
  • 1,353 views

CrossFit and Paleo: Quinoa, protein, anti-oxidants and saponins.

by Andrea Kirk in WODMasters




What are the benefits of Quinoa?
Quinoa is (are?) seeds.  When cooked they taste mildly like toasted broccoli.  This is not as bad as it sounds.  Quinoa is grain-like and can be used in place of rice or pasta.  They are good for breakfast with nuts and cinnamon. .  Quinoa does not contain Gluten.  So if you have celiac disease, gluten sensitivity or are trying to eat Paleo, quinoa should be fine. 

It has a number of benefits over wheat. Quinoa provides mo........ Read more »

  • October 11, 2012
  • 08:15 PM
  • 1,092 views

Is Epinephrine a Rat Poison AND a Human Poison?

by Rogue Medic in Rogue Medic

Dr. Minh LeCong has been a proponent of epinephrine in cardiac arrest, but he is now realizing that the evidence in favor of epinephrine is weak, old, and limited to animal studies. In humans, the evidence for epinephrine is based on an unreasonable infatuation with the temporary production of a pulse.
... Read more »

  • October 11, 2012
  • 05:32 PM
  • 937 views

CrossFit Research: Endurance, Resistance or Alternating Workouts?

by Andrea Kirk in WODMasters







Which is better?  Should you do endurance exercise first and then resistance?  Or resistance training and then endurance?  It looks like alternating your routine gives the best results in terms of performance.  New research published this month reports on the effectiveness of mixed exercise routines in women.  Groups of untrained women were asked to do one of the following:
1. Run on a treadmill for 30 minutes, then do resistance training
2. Do resistance trai........ Read more »

Green JM, Wickwire PJ, McLester JR, Gendle S, Hudson G, Pritchett RC, & Laurent CM. (2007) Effects of caffeine on repetitions to failure and ratings of perceived exertion during resistance training. International journal of sports physiology and performance, 2(3), 250-9. PMID: 19168925  

  • October 5, 2012
  • 04:39 PM
  • 1,116 views

Paleo and Gluten: protecting children from Celiac Disease.

by Andrea Kirk in WODMasters





I've written several articles about gluten, microbes and auto-immunity.   All those interactions are interesting to think about.  To me this has been like tinkering with puzzles.  Celiac disease is a problem of auto-immunity and exposure to the plant protein gluten.  It can be a rough road to follow, especially for children.  They can't eat the same things other kids eat, and other kids and even adults may not understand that something that seems so normal to th........ Read more »

Szajewska H, Chmielewska A, Pieścik-Lech M, Ivarsson A, Kolacek S, Koletzko S, Mearin ML, Shamir R, Auricchio R, Troncone R.... (2012) Systematic review: early infant feeding and the prevention of coeliac disease. Alimentary pharmacology , 36(7), 607-18. PMID: 22905651  

  • October 5, 2012
  • 04:37 PM
  • 696 views

Protecting children from Celiac Disease.

by Andrea Kirk in WODMasters

What is Celiac Disease? I've written several articles about gluten, microbes and auto-immunity.   All those interactions are interesting to think about. Like tinkering with puzzles.  However, protecting children from Celiac Disease is an important issue.  Celiac disease is a problem of auto-immunity and exposure to the plant protein gluten.  It can be a rough road, especially for children.  They can't eat the same things other children eat.  Other kids and even........ Read more »

Szajewska H, Chmielewska A, Pieścik-Lech M, Ivarsson A, Kolacek S, Koletzko S, Mearin ML, Shamir R, Auricchio R, Troncone R.... (2012) Systematic review: early infant feeding and the prevention of coeliac disease. Alimentary pharmacology , 36(7), 607-18. PMID: 22905651  

  • October 4, 2012
  • 01:25 PM
  • 1,091 views

Exercise may protect your jaws and prevent tooth loss.

by Andrea Kirk in WODMasters




Exercise, especially weight-bearing exercise, builds bone and protects against osteoporosis and frailty later in life.  Unfortunately, only bone under stress seems to benefit.  For example, runners, who carry their own body weight, tend to have stronger leg bones than cyclists.  CrossFit provides excellent training for bone strength.  It includes weighted movements that target, stress and should strengthen most of the bones in the human body.  That is provided you don........ Read more »

  • October 4, 2012
  • 01:24 PM
  • 696 views

Gum Chewing and Exercise may protect your jaws and prevent tooth loss.

by Andrea Kirk in WODMasters

Exercise, especially weight-bearing exercise, builds bone and protects against osteoporosis and frailty later in life.  Unfortunately, only bone under stress seems to benefit.  For example, runners, who carry their own body weight, tend to have stronger leg bones than cyclists.  CrossFit provides excellent training for bone strength.  It includes weighted movements that target, stress and should strengthen most of the bones in the human body.  That is provided you don't ........ Read more »

  • October 4, 2012
  • 12:18 PM
  • 1,007 views

Blood Pressure, Vitamin D and Bone Health

by ABK in Environment and Health




Can blood pressure medications cause Vitamin D levels to rise?  Possibly yes.  There has been very little note of this phenomena.  But a correlation may exist and we'll see if any reports appear in the future.  Low Vitamin D has been linked to hypertension.  Some consider it a possible treatment for high blood pressure, although more research is needed.  For more information on this read this review in the current issue of "Current Opinion in Nephrology and ........ Read more »

Soni M, Kos K, Lang IA, Jones K, Melzer D, & Llewellyn DJ. (2012) Vitamin D and cognitive function. Scandinavian journal of clinical and laboratory investigation. Supplementum, 79-82. PMID: 22536767  

Bhandari SK, Pashayan S, Liu IL, Rasgon SA, Kujubu DA, Tom TY, & Sim JJ. (2011) 25-hydroxyvitamin D levels and hypertension rates. Journal of clinical hypertension (Greenwich, Conn.), 13(3), 170-7. PMID: 21366848  

Beard JA, Bearden A, & Striker R. (2011) Vitamin D and the anti-viral state. Journal of clinical virology : the official publication of the Pan American Society for Clinical Virology, 50(3), 194-200. PMID: 21242105  

Ho SL, Alappat L, & Awad AB. (2012) Vitamin D and multiple sclerosis. Critical reviews in food science and nutrition, 52(11), 980-7. PMID: 22823346  

  • October 1, 2012
  • 02:26 PM
  • 1,046 views

Blood Pressure, Vitamin D and Bone Health

by Andrea Kirk in WODMasters




This post is in response to a question that came up about some possible unexpected effects of blood pressure medication on vitamin D.  The question was: can blood pressure medications cause Vitamin D levels to rise?
First, Vitamin D deficiency can be a real problem, leading to:

 rickets (bone deformation/osteomalacia) in children
 osteoporosis in adults. 
 Low Vitamin D has also been correlated with higher risk of some cancers.
 with greater risk of multiple scl........ Read more »

Soni M, Kos K, Lang IA, Jones K, Melzer D, & Llewellyn DJ. (2012) Vitamin D and cognitive function. Scandinavian journal of clinical and laboratory investigation. Supplementum, 79-82. PMID: 22536767  

Bhandari SK, Pashayan S, Liu IL, Rasgon SA, Kujubu DA, Tom TY, & Sim JJ. (2011) 25-hydroxyvitamin D levels and hypertension rates. Journal of clinical hypertension (Greenwich, Conn.), 13(3), 170-7. PMID: 21366848  

Beard JA, Bearden A, & Striker R. (2011) Vitamin D and the anti-viral state. Journal of clinical virology : the official publication of the Pan American Society for Clinical Virology, 50(3), 194-200. PMID: 21242105  

Ho SL, Alappat L, & Awad AB. (2012) Vitamin D and multiple sclerosis. Critical reviews in food science and nutrition, 52(11), 980-7. PMID: 22823346  

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