{"id":9466,"date":"2024-09-20T14:37:47","date_gmt":"2024-09-20T11:37:47","guid":{"rendered":"https:\/\/medilab.km.ua\/?p=9466"},"modified":"2026-04-20T18:55:26","modified_gmt":"2026-04-20T15:55:26","slug":"before-sports-we-analyze-how-training-can-change-the-diagnosis","status":"publish","type":"post","link":"https:\/\/medilab.km.ua\/en\/before-sports-we-analyze-how-training-can-change-the-diagnosis\/","title":{"rendered":"Sports before tests: how training can change diagnostics"},"content":{"rendered":"
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\n 4.9\/5 - (2188 votes) <\/div>\n <\/div>\n

Why you should avoid training before taking tests<\/h2>\n

Physical activity, even moderate, activates hormonal, muscular, immune and metabolic systems<\/strong>. This is a natural reaction of the body to stress. But during laboratory diagnostics it may distort real medical indicators<\/strong>.<\/p>\n

When a doctor sees an elevated creatine phosphokinase (CPK) level, cortisol<\/a> or glucose - it might look like sign of pathology<\/strong>, although in reality it is a consequence of morning exercise or even a walk before donating blood.<\/p>\n

Which indicators change the most due to physical activity?<\/h2>\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n\n
Indicator<\/strong><\/th>\nWhat happens after training?<\/strong><\/th>\n<\/tr>\n<\/thead>\n
Glucose<\/strong><\/td>\nMay decrease (due to muscle consumption) or increase (due to cortisol release)<\/td>\n<\/tr>\n
Creatine phosphokinase (CPK)<\/strong><\/td>\nIncreases significantly after strength training<\/td>\n<\/tr>\n
Myoglobin, lactate, uric acid<\/strong><\/td>\nIncreases during anaerobic exercise<\/td>\n<\/tr>\n
Cortisol, testosterone<\/a>, adrenaline<\/strong><\/td>\nFluctuate sharply depending on the intensity of the training<\/td>\n<\/tr>\n
Leukocytes<\/strong><\/td>\nIncreases in response to stress and muscle microtrauma<\/td>\n<\/tr>\n
C-reactive protein (CRP)<\/strong><\/td>\nTemporary increase after intense exercise<\/td>\n<\/tr>\n
ALT, AST<\/strong><\/td>\nCan grow without liver damage - due to muscle activity<\/td>\n<\/tr>\n
Ferritin<\/strong><\/a><\/td>\nMay increase in response to muscle microinflammation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n
<\/div>\n<\/div>\n<\/div>\n<\/div>\n

If you are having tests for your hormone profile, liver enzymes, or a check-up before a planned surgery \u2014 even low-intensity training the day before may give false results<\/strong>.<\/p>\n

\"Graph<\/p>\n

Frequent situations when sports distort the result<\/h2>\n
    \n
  • \n

    Checkup before surgery<\/strong>: the patient takes tests after morning crossfit - elevated ALT, AST, CRP, CPK, and the doctor cancels the operation<\/p>\n<\/li>\n

  • \n

    Liver examination<\/strong>: light fitness the day before the analysis and ALT shows a double excess<\/p>\n<\/li>\n

  • \n

    Sugar test<\/strong>: after interval training, glucose increases sharply \u2014 although it is normal at rest<\/p>\n<\/li>\n

  • \n

    Leukocytosis in the analysis<\/strong>: perceived as inflammation, but caused by the usual accelerated pace to the laboratory<\/p>\n<\/li>\n<\/ul>\n

    Recommendations for those who do sports<\/h2>\n
      \n
    • \n

      Refrain from exercising at least 24 hours before the test.<\/strong><\/p>\n<\/li>\n

    • \n

      If you are preparing for a medical examination, rest 48 hours after your last workout<\/strong><\/p>\n<\/li>\n

    • \n

      Do not run or walk briskly on the way to the laboratory.<\/p>\n<\/li>\n

    • \n

      On the day of blood donation \u2014 maximum physiological calm<\/strong><\/p>\n<\/li>\n

    • \n

      When taking tests for muscle enzymes, vitamins, ferritin - do not train for 2\u20133 days<\/strong><\/p>\n<\/li>\n<\/ul>\n

      What if training is part of my life?<\/h2>\n

      For athletes and active people it is important to:<\/p>\n

        \n
      • \n

        Notify your doctor or lab technician about your level of physical activity<\/p>\n<\/li>\n

      • \n

        Do control tests after a rest period<\/strong><\/p>\n<\/li>\n

      • \n

        Do not interpret results without taking into account training load.<\/p>\n<\/li>\n

      • \n

        If necessary - perform separate analyses \u201cat rest\u201d and \u201cafter load\u201d<\/strong> for comparison<\/p>\n<\/li>\n<\/ul>\n

        In what cases is training before the analysis permissible?<\/h2>\n
          \n
        • \n

          At assessment of physical adaptation<\/strong> or sports diagnostics<\/strong><\/p>\n<\/li>\n

        • \n

          If the doctor specifically prescribes physical activity before the analysis<\/strong><\/p>\n<\/li>\n

        • \n

          In situations where it is important to evaluate, how the body responds to stress<\/strong><\/p>\n<\/li>\n<\/ul>\n

          But in 95% cases, laboratory diagnostics require absolute physiological rest<\/strong>.<\/p>\n

          Universal advice: if you want accurate result - the day before the analysis should be calm<\/strong>. You won't lose your shape from training, but the doctor will get an objective picture of your health.<\/p>","protected":false},"excerpt":{"rendered":"

          Why you should avoid exercising before taking tests Physical activity, even moderate, activates the hormonal, muscular, immune and metabolic systems. 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