Differences in Cardiorespiratory Responses with Three Set-Paced Submaximal Endurance Tests in Community-Dwelling Older Adults.

A variety of submaximal exercise tests are commonly used in clinical practice to determine an individual's exercise capacity and cardiorespiratory fitness. This study explored differences in cardiorespiratory and perceived exertion responses following the completion of three set-paced exercise tests. A prospective, observational, cross-sectional design assessed 30 healthy communityd-welling older adults, who participated in three submaximal exercise tests, including seated marching (SM), standing marching (STM), and standing stepping (STS). Each test was three minutes in length and required the participant to step at a set pace. Heart rate (HR), blood pressure (BP), rate of perceived exertion (RPE), and submaximal oxygen uptake (VO₂) were measured before and after each test. Repeated measures ANOVA with Bonferroni correction tested for differences. Statistically significant differences between pre and post exercise values were noted for HR, SBP, RPE and VO₂ (p < 0.01) between the three activities. Additionally, 3-minutes of standing stepping triggered the highest cardiorespiratory responses with a mean metabolic equivalent (MET) of 6.18 compared to seated stepping that triggered the lowest responses with a mean MET value of 1.98. The results of this study provide meaningful data on significant differences noted in cardiorespiratory and perceived exertion elicited following the completion of three set-paced stepping exercises. Based on the results, STM and STS can be categorized as moderate intensity activities, while three minutes of set paced SM is light intensity activity. Further research is warranted to validate these findings in older adults with multiple comorbidities and in those consuming cardiac medications that alter hemodynamic responses.