he interrelationships of breathing or leg effort with any exerciseinduced respiratory or limb muscle fatigue.
Thus, the purpose of the present study was to assess the effects of a marathon distance treadmill run on respiratory muscle and lung function immediately after, and up to 24 h after, a marathon. Furthermore, we quantified breathing effort and leg effort during the marathon run to determine the relationship between these factors and the magnitude of any respiratory or leg fatigue post-exercise.
Methods and procedures Participants Nine experienced runners (age 32 +7 years, height
1.79 +0.07 m, body mass 77.8 +9 kg, _ VO
61.6 +3.6 ml kg
71
min
71
, lactate threshold 77.4 +1.8% of
_ VO
; mean +s) volunteered to participate in the study. All participants were free from chronic or acute respiratory conditions. All but one individual had completed at least one marathon race prior to the study. On the basis of previous marathon finish times and current training status, participants were predicted to complete the experimental marathon within 3–4 h. Participants gave written informed consent before the experiment and approval for all experimental procedures was obtained from the institution’s ethics committee. The study was conducted according to the Declaration of Helsinki.
2max
Protocol