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If You Lift, Tell Your Doctor.

Weight Lifting May Alter The Results of Your Next Liver & Kidney Function Test.

Posted by Mark_Gilbert - August 19th, 2014

Most of us have been asked if we are taking any medication or have any allergies by our doctor or at the hospital. This is routine practice because drugs can affect certain test results or react badly with one another and many people are allergic to certain drugs. This way, they can avoid giving you any treatments that are likely to have nasty side effects. For years it has been known that exercise can affect certain tests also and now there is some more research on just how drastically it can do so.

One of the large pharmaceutical firms, AstraZeneca (who I used to work for), has done some testing on how liver and kidney function tests are affected by weight training. These tests look at various natural chemical levels in the blood and if some of them are too high, it is an indicator that one of these organs may not be working properly.

In this study, subjects who exercised but didn’t lift weights did one hour of weight training and were monitored for seven days. Afterwards, researchers found that five out of eight of the main indicators of liver and kidney dysfunction were significantly elevated for the full seven days. Keep in mind that this study was done in people who aren’t regular weight lifters, so the effects may not be as extreme or last as long in bodybuilders who are adapted to weight training. But anyone who trains diligently has unusually heavy or grueling workouts from time to time that may cause several days of muscle soreness and these would be expected to affect these tests.

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So Here’s My Advice:

  1. Don’t train heavy or change your workout dramatically for 7 days before getting medical tests.
  2. Tell your doctor that you weight train and that this has been shown in studies to interfere with liver and kidney tests, as many doctors aren’t familiar with this information.
  3. If you get your tests back with elevated AST, ALT, LD, CK or myoglobin, suggest that you get a second test in a week or more and take a week off training. This is the only way to be reasonably sure of the results.

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Why My Back Is Whack

Hello everyone! This being my first article to Muscular Strength, I thought I should give a brief explanation of what got me into...


When your Dad is your doctor and he used to lift like a mad-man: Priceless! 


If i tell my doctor i know they will look at me like. You think you know more than me lmao and say its not true blah blah so there right lol

jcgadfly  Edit  Delete  Close

Modern humans - most of them want the quick fix. I was that guy too before I gained some real understanding of what I needed to do (don't have it all down yet and likely never will). There, but for the grace of God...

Scott_Herman  Edit  Delete  Close

man @jcgadfly, isn't it annoying when people just want pills?  It's much more than that!

jcgadfly  Edit  Delete  Close

No, that's not good.. My endocrinologist (who gave me the appetite suppressants that got me started and motivated me to hit the gym when I saw results) is the type who asks me what I do and how often I do it. In fact, he asked me when I had crossed the 60 lb loss threshold "So, how many times a week do you go to they gym now?" I said, "I go three times a week, sir." He said, "That's great. Do four." Now, I'm doing five. some people at my church asked my wife for my doctor's name so they could get the meds that helped me lose the weight. I said, "Should I tell them that my doc is also the one who told me to hit the gym four times a week?"


Nice article!!