Intro: Lymphocytes are the defense/immunity cells of the body. Exercise has been known to weaken the immune system. Therefore, researchers sought out to see what an acute bout of intense exercise does to exercise-induced oxidative stress in total lymphocytes.
Conclusion: the results of the present study show that an acute bout of intense exercise caused transient oxidative stress that could be detected by the measurement of protein adducts in lymphocytes.
My input: In this study, participants ran at 80% of their maximal oxygen uptake for 60 minutes, which is a brutal workload. Most of you will not be training at this high of an intensity to worry about reducing the immune response of the body. However, it is common for studies to report a reduce in immune functioning with high intensity training.
Practicality: When you are feeling like a cold is coming on, but still wish to exercise, do so at a moderate intensity. Some studies actually reported that individuals who exercise at a moderate intensity (45-60% VO2max) can actually increase their immune system functioning.
Turner et al J Appl Physiol April 2011.
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