[Purpose] The purpose of this study was to determine the effects of short-term exercise
training on the cardiorespiratory fitness (CRF) of individuals suffering from myocardial
infarction. [Subjects] A total of 60 participants were divided into experimental (EXP;
n=30, mean age 56.7 ± 2.8 years, body mass 80.7 ± 10.7 kg, body height 171.9 ± 7.2 cm) and
control (CON; n=30, mean age 56.5 ± 3.1 years, body mass 84.4 ± 12.4 kg, body height 171.5
± 12.4 cm) groups. [Methods] The members of the EXP group took part in an organized daily
physical exercise program (Monday through Sunday), for a period of 3 weeks. The exercise
program consisted of 60 min daily specialized fitness exercises with an intensity ranging
from 55–70% of the maximum heart rate, which was determined by test on a bicycle
ergometer. The effects of the exercise were monitored by means of the following
parameters: maximum oxygen uptake (VO2peak), resting heart rate, systolic blood pressure
and diastolic blood pressure. [Results] The results indicate statistically significant
post-exercise improvements in heart rate, relative oxygen uptake and systolic blood
pressure, among the members of the EXP group. The results indicate that at the initial
measurement of cardiorespiratory fitness no statistically significant differences were
found between the groups at the multivariate level (Wilk's λ=0.83), while statistically
significant differences in the cardiorespiratory fitness were found at the final
measurement (Wil's λ=0.430). [Conclusion] The obtained results indicate that the exercise
program, which lasted for a period of 21 days, though shorter in duration than other
programs still led to statistically significant changes in the CRF of individuals
suffering from MI.